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    "textoCompleto" => "<span class="elsevierStyleSections"><span id="sec0005" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0065">Introduction</span><p id="par0005" class="elsevierStylePara elsevierViewall">Systemic lupus erythematosus &#40;SLE&#41; is a chronic autoimmune disease that affects multiple organs and is clinically and serologically heterogeneous&#46; Worldwide its reported incidence stands at from 1 to 31&#46;9&#47;100&#44;000 per year&#44; at it is more common in mixed race populations&#46;<a class="elsevierStyleCrossRef" href="#bib0080"><span class="elsevierStyleSup">1</span></a></p><p id="par0010" class="elsevierStylePara elsevierViewall">In spite of the advances made in diagnosis and treatment&#44; its corresponding rates of morbimortality are still high&#46; It mainly affects developing countries such as those in Latin America &#40;LA&#41;&#44; due to their socioeconomic and genetic characteristics&#44; as these play a major role in the disease and lead to unfavourable outcomes&#46;<a class="elsevierStyleCrossRef" href="#bib0085"><span class="elsevierStyleSup">2</span></a></p><p id="par0015" class="elsevierStylePara elsevierViewall">Given the problematic nature of SLE&#44; it is important not only to analyse the trends in scientific production&#44; but also to examine international collaboration with other countries&#46; This is particularly so for this disease&#44; as it requires a multidisciplinary approach as well as access to more specialised technology&#44; with the participation of experienced authors in this field&#46; The benefits of this will arise in terms of citation and impact&#44; as well as better control of the disease&#46;<a class="elsevierStyleCrossRef" href="#bib0090"><span class="elsevierStyleSup">3</span></a></p><p id="par0020" class="elsevierStylePara elsevierViewall">Bibliometric study identifies publishing tendencies in common fields of research&#44; allowing researchers to improve the alignment of their investigative consultations to areas where evidence is lacking and to recognise the scientific production of each country and the collaboration it involves&#46; However&#44; there may be little research into this disease in LA&#44; as Brazil and M&#233;xico are the only countries in the region which frequently produce material on this health problem&#46;<a class="elsevierStyleCrossRef" href="#bib0095"><span class="elsevierStyleSup">4</span></a></p><p id="par0025" class="elsevierStylePara elsevierViewall">Due to the above considerations and given the incidence and resulting outcomes of the disease in LA populations&#44; it would be relevant to analyse the trends in scientific production on this subject&#44; using bibliometric analysis and studying collaboration&#46;</p></span><span id="sec0010" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0070">Materials and methods</span><p id="par0030" class="elsevierStylePara elsevierViewall">Documents published in journals indexed in Scopus from 1982 to 2018 were analysed bibliometrically&#46; Given the history and start of diagnostic criteria in 1982&#44; this year was considered to be the key point to commence searching the literature on SLE&#46;<a class="elsevierStyleCrossRef" href="#bib0100"><span class="elsevierStyleSup">5</span></a></p><span id="sec0015" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0075">Source of information</span><p id="par0035" class="elsevierStylePara elsevierViewall">Scopus &#40;Elsevier&#44; the Netherlands&#41; was selected&#44; as it is considered to be the main multidisciplinary bibliographical database in the world&#46; This is so not only in terms of quality&#44; as it also has a broader coverage of citations and journals&#44; including 100&#37; of those which are indexed in Medline&#46; It also records the filiations of all authors&#44; which is fundamental for analysis of collaborative networks&#46;<a class="elsevierStyleCrossRef" href="#bib0105"><span class="elsevierStyleSup">6</span></a></p></span><span id="sec0020" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0080">Search strategy</span><p id="par0040" class="elsevierStylePara elsevierViewall">The search strategy included different entries&#44; based on medical subject headings &#40;MeSH&#41; for &#8220;<span class="elsevierStyleItalic">lupus erythematosus&#44; systemic&#8221;</span> and LA countries &#40;Appendix A&#44; additional material 1&#41;&#46; Scopus was searched in July 2019&#44; restricted only to the type of sources in journals&#44; i&#46;e&#46;&#58; original papers &#40;defined as papers with the following structure&#58; abstract&#44; introduction&#44; methods&#44; results and discussion&#59; or an equivalent structure&#41; and other types of documents &#40;reviews&#44; letters&#44; conference documents&#44; notes&#44; editorials&#44; short surveys and errata&#41;&#46; Congress minutes were excluded&#44; as were books&#44; series of books and commercial publications&#46;</p></span><span id="sec0025" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0085">Analysis</span><p id="par0045" class="elsevierStylePara elsevierViewall">Search data were imported into Microsoft Excel 2019 &#40;Microsoft Corp&#44; United States&#41;&#44; and bibliometric indicators were shown for annual production and type of scientific publication&#46; Statistical analysis was applied using the Student t-test to determine the significance of annual production&#46; A visualisation map was shown using version 1&#46;6&#46;0 of VOSviewer &#40;Leiden University&#44; the Netherlands&#41; to develop concurrence analysis of collaboration between countries&#46; Interpretation of the graph is based on the size of the circle&#44; the thickness of connecting lines and the distance between terms &#40;countries or key words&#41;&#46; The size of the circle is the scale of the total number of occurrences or productivity&#44; and its colour will depend on groups based on the coincidence of terms&#59; the thickness of connecting lines indicates the strength of links numerically&#44; while proximity suggests stronger collaboration&#46;<a class="elsevierStyleCrossRef" href="#bib0110"><span class="elsevierStyleSup">7</span></a></p></span><span id="sec0030" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0090">Ethical considerations</span><p id="par0050" class="elsevierStylePara elsevierViewall">Data were downloaded from available research publications&#44; so that no ethical approval was needed&#46;</p></span></span><span id="sec0035" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0095">Results</span><p id="par0055" class="elsevierStylePara elsevierViewall">Our final search resulted in 3843 documents from 1982 to 2018 &#40;Appendix A&#44; additional material 2&#41; about SLE in LA&#46; An increasing tendency was found&#44; with higher production in the year 2018 &#40;267 documents&#41;&#46; The annual average amounted to 35&#46;4 documents per year&#44; with an annual growth rate of 11&#37;&#46; In the last 20 years there was a significant increase in average scientific production in comparison with 1982&#8211;1998 &#40;168&#46;7 vs 35&#46;4&#59; <span class="elsevierStyleItalic">P</span><span class="elsevierStyleHsp" style=""></span>&#60;<span class="elsevierStyleHsp" style=""></span>&#46;005&#41;&#46; The greatest number of publications were original papers &#40;<span class="elsevierStyleItalic">n</span><span class="elsevierStyleHsp" style=""></span>&#61;<span class="elsevierStyleHsp" style=""></span>2899&#59; 75&#46;4&#37;&#41; and review papers &#40;<span class="elsevierStyleItalic">n</span><span class="elsevierStyleHsp" style=""></span>&#61;<span class="elsevierStyleHsp" style=""></span>523&#59; 13&#46;6&#37;&#41;&#44; while the smallest number produced corresponded to letters &#40;<span class="elsevierStyleItalic">n</span><span class="elsevierStyleHsp" style=""></span>&#61;<span class="elsevierStyleHsp" style=""></span>206&#59; 5&#46;3&#37;&#41; and other types of document &#40;<span class="elsevierStyleItalic">n</span><span class="elsevierStyleHsp" style=""></span>&#61;<span class="elsevierStyleHsp" style=""></span>215&#59; 5&#46;5&#37;&#41; &#40;<a class="elsevierStyleCrossRef" href="#fig0005">Fig&#46; 1</a>&#41;&#46;</p><elsevierMultimedia ident="fig0005"></elsevierMultimedia><p id="par0060" class="elsevierStylePara elsevierViewall">In the last 37 years 40 countries with at least 10 published documents were registered in Scopus&#44; where 11 Latin American countries were recorded as having collaborated with 29 countries outside the region&#46; The countries with the highest production &#40;shown as percentages&#41; and scientific collaboration &#40;with more than 35 countries&#41; were&#58; Brazil &#40;43&#46;1&#37;&#41;&#44; M&#233;xico &#40;29&#46;4&#37;&#41;&#44; Argentina &#40;10&#46;8&#37;&#41;&#44; Colombia &#40;9&#46;8&#37;&#41; and Chile &#40;4&#46;1&#37;&#41;&#44; in collaboration mainly with the United States&#44; Spain&#44; the United Kingdom and France&#59; while the countries with the least scientific collaboration &#40;with fewer than 12 countries&#41; were&#58; Cuba &#40;1&#46;2&#37;&#41; and Uruguay &#40;0&#46;7&#37;&#41; &#40;<a class="elsevierStyleCrossRef" href="#fig0010">Fig&#46; 2</a>&#41;&#46;</p><elsevierMultimedia ident="fig0010"></elsevierMultimedia></span><span id="sec0040" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0100">Discussion</span><p id="par0065" class="elsevierStylePara elsevierViewall">At LA level&#44; research into SLE in the last 5 years has increased considerably in comparison with previous years&#46;<a class="elsevierStyleCrossRef" href="#bib0095"><span class="elsevierStyleSup">4</span></a> This is associated with the complexity of the disease and the opening up of new fields of knowledge&#44; such as translational or epigenetic research&#46;<a class="elsevierStyleCrossRef" href="#bib0115"><span class="elsevierStyleSup">8</span></a></p><p id="par0070" class="elsevierStylePara elsevierViewall">Brazil and M&#233;xico were the countries where production and scientific collaboration were highest&#46; This result is probably not a coincidence and may be explained in different ways&#46; Firstly&#44; both countries have the highest amount of scientific production in different fields within LA&#44; principally in Medicine<a class="elsevierStyleCrossRef" href="#bib0120"><span class="elsevierStyleSup">9</span></a> and Public Health&#46;<a class="elsevierStyleCrossRef" href="#bib0125"><span class="elsevierStyleSup">10</span></a> Secondly&#44; both countries have their own SLE guidelines&#44; prepared by the academic &#8211; scientific institutions such as the Brazilian Society of Rheumatology<a class="elsevierStyleCrossRef" href="#bib0130"><span class="elsevierStyleSup">11</span></a> and the Mexican College of Rheumatology&#46;<a class="elsevierStyleCrossRef" href="#bib0135"><span class="elsevierStyleSup">12</span></a> Thirdly&#44; SLE is a major problem in Brazil&#44; where mortality trends have not improved consistently&#59; this may be one of the reasons that would drive the need for research in this field&#46; Fourthly&#44; in the case of M&#233;xico&#44; ethnic differences are known to be important in the pathogenesis and complications associated with SLE&#44; and M&#233;xico is a multiethnic country&#44;<a class="elsevierStyleCrossRef" href="#bib0140"><span class="elsevierStyleSup">13</span></a> which would also be a reason for the special interest in researching this subject&#46; Fifthly&#44; it is probable that there is a connection with the sociodemographic data of these countries&#44; as both of them have the highest total populations&#44; the highest GDP and the highest percentage of GDP devoted to research and development in LA&#46;<a class="elsevierStyleCrossRef" href="#bib0145"><span class="elsevierStyleSup">14</span></a></p><p id="par0075" class="elsevierStylePara elsevierViewall">On the other hand&#44; it has to be said that the publication of original papers largely contributes to the generation of new knowledge&#44;<a class="elsevierStyleCrossRef" href="#bib0090"><span class="elsevierStyleSup">3</span></a> so that their publication in high impact journals would make them more visible and increase the number of citations &#40;CiteScore &#38; Scimago Journal Ranking&#41;&#46; Likewise&#44; obtaining financial support and scientific collaboration make it possible to share resources&#44; skills and experience in interventions&#44; achieving better results than would have been the case working individually&#46; This could explain the good scientific performance of Brazil&#44; M&#233;xico and Argentina in comparison with other LA countries&#44;<a class="elsevierStyleCrossRef" href="#bib0150"><span class="elsevierStyleSup">15</span></a> and their collaboration&#44; mainly with the United States and Spain&#44; both of which have specialised rheumatic disease centres and a good number of scientific publications about SLE&#46;<a class="elsevierStyleCrossRef" href="#bib0095"><span class="elsevierStyleSup">4</span></a></p><p id="par0080" class="elsevierStylePara elsevierViewall">Some limitations should be mentioned&#46; First&#44; we do not include studies indexed in databases other than Scopus&#44; which may lead to an underestimate of the actual total number of publications&#46; Nevertheless&#44; the Scopus database has greater advantages in terms of precision&#44; citations and summaries of peer-reviewed literature in comparison with other databases&#46;<a class="elsevierStyleCrossRef" href="#bib0105"><span class="elsevierStyleSup">6</span></a> Second&#44; there may be studies by Latin American authors that have not included their filiation in a LA institution&#44; so that probably they have not been included in this analysis&#46;</p></span><span id="sec0045" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0105">Conclusions</span><p id="par0085" class="elsevierStylePara elsevierViewall">This paper offers interesting information on the scientific production on SLE in LA&#44; and it finds a growing tendency&#46; Brazil and M&#233;xico generated more than half of the publications in question&#44; and they are the main sources of collaboration with Argentina&#46; However&#44; it is necessary to strengthen the collaborative capacity of other LA countries&#46;</p></span><span id="sec0050" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0110">Conflict of interest</span><p id="par0090" class="elsevierStylePara elsevierViewall">The authors have no conflict of interests to declare&#46;</p></span></span>"
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    "fechaRecibido" => "2019-08-30"
    "fechaAceptado" => "2020-01-06"
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        "titulo" => "Abstract"
        "resumen" => "<span id="abst0005" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0010">Objective</span><p id="spar0005" class="elsevierStyleSimplePara elsevierViewall">To analyse the scientific production and collaboration networks on publications in systemic lupus erythematosus in Latin America&#46;</p></span> <span id="abst0010" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0015">Materials and methods</span><p id="spar0010" class="elsevierStyleSimplePara elsevierViewall">Bibliometric study between 1982 and 2018 of journals indexed in Scopus&#46; Data were analysed by annual production and a co-occurrence analysis of the collaboration between countries with VOSviewer was plotted&#46;</p></span> <span id="abst0015" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0020">Results</span><p id="spar0015" class="elsevierStyleSimplePara elsevierViewall">3843 related documents on systemic lupus erythematosus were recorded between 1982 and 2018 in Scopus&#46; An increasing trend was observed&#44; with a significant increase in the last 20 years&#44; the original articles being the highest percentage &#40;75&#46;4&#37;&#41;&#46; Eleven Latin American countries were identified in collaboration with 29 extra-regional countries&#44; with Brazil&#44; Mexico and Argentina having the highest production and scientific collaboration&#44; mainly with the United States and Spain&#46;</p></span> <span id="abst0020" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0025">Conclusion</span><p id="spar0020" class="elsevierStyleSimplePara elsevierViewall">In Latin America&#44; there is a sustained increase in research on systemic lupus erythematosus&#46; Brazil and Mexico generated more than half the publications and are the main collaboration network together with Argentina&#46;</p></span>"
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        "resumen" => "<span id="abst0025" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0035">Objetivo</span><p id="spar0025" class="elsevierStyleSimplePara elsevierViewall">Analizar la producci&#243;n cient&#237;fica y redes de colaboraci&#243;n a partir de las publicaciones sobre lupus eritematoso sist&#233;mico en Latinoam&#233;rica&#46;</p></span> <span id="abst0030" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0040">Materiales y m&#233;todos</span><p id="spar0030" class="elsevierStyleSimplePara elsevierViewall">Estudio bibliom&#233;trico de revistas publicadas entre los a&#241;os 1982 y 2018 e indizadas en Scopus&#46; Se analizaron datos por producci&#243;n anual y se represent&#243; gr&#225;ficamente&#44; mediante VOSviewer&#44; un an&#225;lisis de coocurrencia de la colaboraci&#243;n entre pa&#237;ses&#46;</p></span> <span id="abst0035" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0045">Resultados</span><p id="spar0035" class="elsevierStyleSimplePara elsevierViewall">Se registraron 3&#46;843 documentos sobre lupus eritematoso sist&#233;mico entre 1982 y 2018 en Scopus&#46; Se observ&#243; una tendencia en aumento&#44; con un incremento significativo en los &#250;ltimos 20 a&#241;os&#44; siendo los art&#237;culos originales los de mayor porcentaje &#40;75&#44;4&#37;&#41;&#46; Se identificaron 11 pa&#237;ses latinoamericanos en colaboraci&#243;n con 29 pa&#237;ses extrarregionales&#44; siendo Brasil&#44; M&#233;xico y Argentina quienes tuvieron la mayor producci&#243;n y colaboraci&#243;n cient&#237;fica&#44; principalmente con Estados Unidos y Espa&#241;a&#46;</p></span> <span id="abst0040" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0050">Conclusi&#243;n</span><p id="spar0040" class="elsevierStyleSimplePara elsevierViewall">En Latinoam&#233;rica existe un incremento sostenido en investigaci&#243;n sobre lupus eritematoso sist&#233;mico&#46; Brasil y M&#233;xico generaron m&#225;s de la mitad de las publicaciones y son la principal red de colaboraci&#243;n junto con Argentina&#46;</p></span>"
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              "referencia" => array:1 [
                0 => array:2 [
                  "contribucion" => array:1 [
                    0 => array:2 [
                      "titulo" => "Epidemiology of systemic lupus erythematosus&#58; an update"
                      "autores" => array:1 [
                        0 => array:2 [
                          "etal" => false
                          "autores" => array:2 [
                            0 => "G&#46; Stojan"
                            1 => "M&#46; Petri"
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                  "host" => array:1 [
                    0 => array:2 [
                      "doi" => "10.1097/BOR.0000000000000480"
                      "Revista" => array:6 [
                        "tituloSerie" => "Curr Opin Rheumatol"
                        "fecha" => "2018"
                        "volumen" => "30"
                        "paginaInicial" => "144"
                        "paginaFinal" => "150"
                        "link" => array:1 [
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                            "url" => "https://www.ncbi.nlm.nih.gov/pubmed/29251660"
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                  ]
                ]
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            1 => array:3 [
              "identificador" => "bib0085"
              "etiqueta" => "2"
              "referencia" => array:1 [
                0 => array:2 [
                  "contribucion" => array:1 [
                    0 => array:2 [
                      "titulo" => "Relationship between poverty and mortality in systemic lupus erythematosus"
                      "autores" => array:1 [
                        0 => array:2 [
                          "etal" => false
                          "autores" => array:3 [
                            0 => "E&#46; Yelin"
                            1 => "J&#46; Yazdany"
                            2 => "L&#46; Trupin"
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                        ]
                      ]
                    ]
                  ]
                  "host" => array:1 [
                    0 => array:2 [
                      "doi" => "10.1002/acr.23428"
                      "Revista" => array:5 [
                        "tituloSerie" => "Arthritis Care Res"
                        "fecha" => "2018"
                        "volumen" => "70"
                        "paginaInicial" => "1101"
                        "paginaFinal" => "1106"
                      ]
                    ]
                  ]
                ]
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            2 => array:3 [
              "identificador" => "bib0090"
              "etiqueta" => "3"
              "referencia" => array:1 [
                0 => array:2 [
                  "contribucion" => array:1 [
                    0 => array:2 [
                      "titulo" => "What is research collaboration&#63;"
                      "autores" => array:1 [
                        0 => array:2 [
                          "etal" => false
                          "autores" => array:2 [
                            0 => "J&#46;S&#46; Katz"
                            1 => "B&#46;R&#46; Martin"
                          ]
                        ]
                      ]
                    ]
                  ]
                  "host" => array:1 [
                    0 => array:2 [
                      "doi" => "10.1016/S0048-7333(96)00917-1"
                      "Revista" => array:5 [
                        "tituloSerie" => "Res Policy"
                        "fecha" => "1997"
                        "volumen" => "26"
                        "paginaInicial" => "1"
                        "paginaFinal" => "18"
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                  ]
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              ]
            ]
            3 => array:3 [
              "identificador" => "bib0095"
              "etiqueta" => "4"
              "referencia" => array:1 [
                0 => array:2 [
                  "contribucion" => array:1 [
                    0 => array:2 [
                      "titulo" => "A bibliometric study of literature on SLE research in PubMed &#40;2002&#8211;2011&#41;"
                      "autores" => array:1 [
                        0 => array:2 [
                          "etal" => false
                          "autores" => array:3 [
                            0 => "B&#46;Z&#46; Li"
                            1 => "H&#46;F&#46; Pan"
                            2 => "D&#46;Q&#46; Ye"
                          ]
                        ]
                      ]
                    ]
                  ]
                  "host" => array:1 [
                    0 => array:2 [
                      "doi" => "10.1177/0961203313491850"
                      "Revista" => array:6 [
                        "tituloSerie" => "Lupus"
                        "fecha" => "2013"
                        "volumen" => "22"
                        "paginaInicial" => "772"
                        "paginaFinal" => "777"
                        "link" => array:1 [
                          0 => array:2 [
                            "url" => "https://www.ncbi.nlm.nih.gov/pubmed/23753297"
                            "web" => "Medline"
                          ]
                        ]
                      ]
                    ]
                  ]
                ]
              ]
            ]
            4 => array:3 [
              "identificador" => "bib0100"
              "etiqueta" => "5"
              "referencia" => array:1 [
                0 => array:2 [
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Bibliometric profile and collaborative networks in scientific research on systemic lupus erythematosus in Latin America, 1982–2018
Perfil bibliométrico y redes de colaboración en investigación científica sobre lupus eritematoso sistémico en Latinoamérica, 1982-2018
Cristian Morán-Mariñosa,
Corresponding author
cp.moran94@gmail.com

Corresponding author.
, Carlos J. Toro-Huamanchumob, Josmel Pacheco-Mendozaa
a Unidad de Investigación en Bibliometría, Vicerrectorado de Investigación, Universidad San Ignacio de Loyola, Lima, Peru
b Unidad de Investigación para la Generación y Síntesis de Evidencias en Salud, Universidad San Ignacio de Loyola, Lima, Peru
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          "en" => "<p id="spar0050" class="elsevierStyleSimplePara elsevierViewall">Latin American countries that had collaborated with foreign countries in the publication of papers on systemic lupus erythematosus&#46; Analysis was weighted according to the number of documents&#44; and 40 countries were included&#46;</p>"
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    "textoCompleto" => "<span class="elsevierStyleSections"><span id="sec0005" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0065">Introduction</span><p id="par0005" class="elsevierStylePara elsevierViewall">Systemic lupus erythematosus &#40;SLE&#41; is a chronic autoimmune disease that affects multiple organs and is clinically and serologically heterogeneous&#46; Worldwide its reported incidence stands at from 1 to 31&#46;9&#47;100&#44;000 per year&#44; at it is more common in mixed race populations&#46;<a class="elsevierStyleCrossRef" href="#bib0080"><span class="elsevierStyleSup">1</span></a></p><p id="par0010" class="elsevierStylePara elsevierViewall">In spite of the advances made in diagnosis and treatment&#44; its corresponding rates of morbimortality are still high&#46; It mainly affects developing countries such as those in Latin America &#40;LA&#41;&#44; due to their socioeconomic and genetic characteristics&#44; as these play a major role in the disease and lead to unfavourable outcomes&#46;<a class="elsevierStyleCrossRef" href="#bib0085"><span class="elsevierStyleSup">2</span></a></p><p id="par0015" class="elsevierStylePara elsevierViewall">Given the problematic nature of SLE&#44; it is important not only to analyse the trends in scientific production&#44; but also to examine international collaboration with other countries&#46; This is particularly so for this disease&#44; as it requires a multidisciplinary approach as well as access to more specialised technology&#44; with the participation of experienced authors in this field&#46; The benefits of this will arise in terms of citation and impact&#44; as well as better control of the disease&#46;<a class="elsevierStyleCrossRef" href="#bib0090"><span class="elsevierStyleSup">3</span></a></p><p id="par0020" class="elsevierStylePara elsevierViewall">Bibliometric study identifies publishing tendencies in common fields of research&#44; allowing researchers to improve the alignment of their investigative consultations to areas where evidence is lacking and to recognise the scientific production of each country and the collaboration it involves&#46; However&#44; there may be little research into this disease in LA&#44; as Brazil and M&#233;xico are the only countries in the region which frequently produce material on this health problem&#46;<a class="elsevierStyleCrossRef" href="#bib0095"><span class="elsevierStyleSup">4</span></a></p><p id="par0025" class="elsevierStylePara elsevierViewall">Due to the above considerations and given the incidence and resulting outcomes of the disease in LA populations&#44; it would be relevant to analyse the trends in scientific production on this subject&#44; using bibliometric analysis and studying collaboration&#46;</p></span><span id="sec0010" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0070">Materials and methods</span><p id="par0030" class="elsevierStylePara elsevierViewall">Documents published in journals indexed in Scopus from 1982 to 2018 were analysed bibliometrically&#46; Given the history and start of diagnostic criteria in 1982&#44; this year was considered to be the key point to commence searching the literature on SLE&#46;<a class="elsevierStyleCrossRef" href="#bib0100"><span class="elsevierStyleSup">5</span></a></p><span id="sec0015" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0075">Source of information</span><p id="par0035" class="elsevierStylePara elsevierViewall">Scopus &#40;Elsevier&#44; the Netherlands&#41; was selected&#44; as it is considered to be the main multidisciplinary bibliographical database in the world&#46; This is so not only in terms of quality&#44; as it also has a broader coverage of citations and journals&#44; including 100&#37; of those which are indexed in Medline&#46; It also records the filiations of all authors&#44; which is fundamental for analysis of collaborative networks&#46;<a class="elsevierStyleCrossRef" href="#bib0105"><span class="elsevierStyleSup">6</span></a></p></span><span id="sec0020" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0080">Search strategy</span><p id="par0040" class="elsevierStylePara elsevierViewall">The search strategy included different entries&#44; based on medical subject headings &#40;MeSH&#41; for &#8220;<span class="elsevierStyleItalic">lupus erythematosus&#44; systemic&#8221;</span> and LA countries &#40;Appendix A&#44; additional material 1&#41;&#46; Scopus was searched in July 2019&#44; restricted only to the type of sources in journals&#44; i&#46;e&#46;&#58; original papers &#40;defined as papers with the following structure&#58; abstract&#44; introduction&#44; methods&#44; results and discussion&#59; or an equivalent structure&#41; and other types of documents &#40;reviews&#44; letters&#44; conference documents&#44; notes&#44; editorials&#44; short surveys and errata&#41;&#46; Congress minutes were excluded&#44; as were books&#44; series of books and commercial publications&#46;</p></span><span id="sec0025" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0085">Analysis</span><p id="par0045" class="elsevierStylePara elsevierViewall">Search data were imported into Microsoft Excel 2019 &#40;Microsoft Corp&#44; United States&#41;&#44; and bibliometric indicators were shown for annual production and type of scientific publication&#46; Statistical analysis was applied using the Student t-test to determine the significance of annual production&#46; A visualisation map was shown using version 1&#46;6&#46;0 of VOSviewer &#40;Leiden University&#44; the Netherlands&#41; to develop concurrence analysis of collaboration between countries&#46; Interpretation of the graph is based on the size of the circle&#44; the thickness of connecting lines and the distance between terms &#40;countries or key words&#41;&#46; The size of the circle is the scale of the total number of occurrences or productivity&#44; and its colour will depend on groups based on the coincidence of terms&#59; the thickness of connecting lines indicates the strength of links numerically&#44; while proximity suggests stronger collaboration&#46;<a class="elsevierStyleCrossRef" href="#bib0110"><span class="elsevierStyleSup">7</span></a></p></span><span id="sec0030" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0090">Ethical considerations</span><p id="par0050" class="elsevierStylePara elsevierViewall">Data were downloaded from available research publications&#44; so that no ethical approval was needed&#46;</p></span></span><span id="sec0035" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0095">Results</span><p id="par0055" class="elsevierStylePara elsevierViewall">Our final search resulted in 3843 documents from 1982 to 2018 &#40;Appendix A&#44; additional material 2&#41; about SLE in LA&#46; An increasing tendency was found&#44; with higher production in the year 2018 &#40;267 documents&#41;&#46; The annual average amounted to 35&#46;4 documents per year&#44; with an annual growth rate of 11&#37;&#46; In the last 20 years there was a significant increase in average scientific production in comparison with 1982&#8211;1998 &#40;168&#46;7 vs 35&#46;4&#59; <span class="elsevierStyleItalic">P</span><span class="elsevierStyleHsp" style=""></span>&#60;<span class="elsevierStyleHsp" style=""></span>&#46;005&#41;&#46; The greatest number of publications were original papers &#40;<span class="elsevierStyleItalic">n</span><span class="elsevierStyleHsp" style=""></span>&#61;<span class="elsevierStyleHsp" style=""></span>2899&#59; 75&#46;4&#37;&#41; and review papers &#40;<span class="elsevierStyleItalic">n</span><span class="elsevierStyleHsp" style=""></span>&#61;<span class="elsevierStyleHsp" style=""></span>523&#59; 13&#46;6&#37;&#41;&#44; while the smallest number produced corresponded to letters &#40;<span class="elsevierStyleItalic">n</span><span class="elsevierStyleHsp" style=""></span>&#61;<span class="elsevierStyleHsp" style=""></span>206&#59; 5&#46;3&#37;&#41; and other types of document &#40;<span class="elsevierStyleItalic">n</span><span class="elsevierStyleHsp" style=""></span>&#61;<span class="elsevierStyleHsp" style=""></span>215&#59; 5&#46;5&#37;&#41; &#40;<a class="elsevierStyleCrossRef" href="#fig0005">Fig&#46; 1</a>&#41;&#46;</p><elsevierMultimedia ident="fig0005"></elsevierMultimedia><p id="par0060" class="elsevierStylePara elsevierViewall">In the last 37 years 40 countries with at least 10 published documents were registered in Scopus&#44; where 11 Latin American countries were recorded as having collaborated with 29 countries outside the region&#46; The countries with the highest production &#40;shown as percentages&#41; and scientific collaboration &#40;with more than 35 countries&#41; were&#58; Brazil &#40;43&#46;1&#37;&#41;&#44; M&#233;xico &#40;29&#46;4&#37;&#41;&#44; Argentina &#40;10&#46;8&#37;&#41;&#44; Colombia &#40;9&#46;8&#37;&#41; and Chile &#40;4&#46;1&#37;&#41;&#44; in collaboration mainly with the United States&#44; Spain&#44; the United Kingdom and France&#59; while the countries with the least scientific collaboration &#40;with fewer than 12 countries&#41; were&#58; Cuba &#40;1&#46;2&#37;&#41; and Uruguay &#40;0&#46;7&#37;&#41; &#40;<a class="elsevierStyleCrossRef" href="#fig0010">Fig&#46; 2</a>&#41;&#46;</p><elsevierMultimedia ident="fig0010"></elsevierMultimedia></span><span id="sec0040" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0100">Discussion</span><p id="par0065" class="elsevierStylePara elsevierViewall">At LA level&#44; research into SLE in the last 5 years has increased considerably in comparison with previous years&#46;<a class="elsevierStyleCrossRef" href="#bib0095"><span class="elsevierStyleSup">4</span></a> This is associated with the complexity of the disease and the opening up of new fields of knowledge&#44; such as translational or epigenetic research&#46;<a class="elsevierStyleCrossRef" href="#bib0115"><span class="elsevierStyleSup">8</span></a></p><p id="par0070" class="elsevierStylePara elsevierViewall">Brazil and M&#233;xico were the countries where production and scientific collaboration were highest&#46; This result is probably not a coincidence and may be explained in different ways&#46; Firstly&#44; both countries have the highest amount of scientific production in different fields within LA&#44; principally in Medicine<a class="elsevierStyleCrossRef" href="#bib0120"><span class="elsevierStyleSup">9</span></a> and Public Health&#46;<a class="elsevierStyleCrossRef" href="#bib0125"><span class="elsevierStyleSup">10</span></a> Secondly&#44; both countries have their own SLE guidelines&#44; prepared by the academic &#8211; scientific institutions such as the Brazilian Society of Rheumatology<a class="elsevierStyleCrossRef" href="#bib0130"><span class="elsevierStyleSup">11</span></a> and the Mexican College of Rheumatology&#46;<a class="elsevierStyleCrossRef" href="#bib0135"><span class="elsevierStyleSup">12</span></a> Thirdly&#44; SLE is a major problem in Brazil&#44; where mortality trends have not improved consistently&#59; this may be one of the reasons that would drive the need for research in this field&#46; Fourthly&#44; in the case of M&#233;xico&#44; ethnic differences are known to be important in the pathogenesis and complications associated with SLE&#44; and M&#233;xico is a multiethnic country&#44;<a class="elsevierStyleCrossRef" href="#bib0140"><span class="elsevierStyleSup">13</span></a> which would also be a reason for the special interest in researching this subject&#46; Fifthly&#44; it is probable that there is a connection with the sociodemographic data of these countries&#44; as both of them have the highest total populations&#44; the highest GDP and the highest percentage of GDP devoted to research and development in LA&#46;<a class="elsevierStyleCrossRef" href="#bib0145"><span class="elsevierStyleSup">14</span></a></p><p id="par0075" class="elsevierStylePara elsevierViewall">On the other hand&#44; it has to be said that the publication of original papers largely contributes to the generation of new knowledge&#44;<a class="elsevierStyleCrossRef" href="#bib0090"><span class="elsevierStyleSup">3</span></a> so that their publication in high impact journals would make them more visible and increase the number of citations &#40;CiteScore &#38; Scimago Journal Ranking&#41;&#46; Likewise&#44; obtaining financial support and scientific collaboration make it possible to share resources&#44; skills and experience in interventions&#44; achieving better results than would have been the case working individually&#46; This could explain the good scientific performance of Brazil&#44; M&#233;xico and Argentina in comparison with other LA countries&#44;<a class="elsevierStyleCrossRef" href="#bib0150"><span class="elsevierStyleSup">15</span></a> and their collaboration&#44; mainly with the United States and Spain&#44; both of which have specialised rheumatic disease centres and a good number of scientific publications about SLE&#46;<a class="elsevierStyleCrossRef" href="#bib0095"><span class="elsevierStyleSup">4</span></a></p><p id="par0080" class="elsevierStylePara elsevierViewall">Some limitations should be mentioned&#46; First&#44; we do not include studies indexed in databases other than Scopus&#44; which may lead to an underestimate of the actual total number of publications&#46; Nevertheless&#44; the Scopus database has greater advantages in terms of precision&#44; citations and summaries of peer-reviewed literature in comparison with other databases&#46;<a class="elsevierStyleCrossRef" href="#bib0105"><span class="elsevierStyleSup">6</span></a> Second&#44; there may be studies by Latin American authors that have not included their filiation in a LA institution&#44; so that probably they have not been included in this analysis&#46;</p></span><span id="sec0045" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0105">Conclusions</span><p id="par0085" class="elsevierStylePara elsevierViewall">This paper offers interesting information on the scientific production on SLE in LA&#44; and it finds a growing tendency&#46; Brazil and M&#233;xico generated more than half of the publications in question&#44; and they are the main sources of collaboration with Argentina&#46; However&#44; it is necessary to strengthen the collaborative capacity of other LA countries&#46;</p></span><span id="sec0050" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0110">Conflict of interest</span><p id="par0090" class="elsevierStylePara elsevierViewall">The authors have no conflict of interests to declare&#46;</p></span></span>"
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        0 => array:4 [
          "clase" => "keyword"
          "titulo" => "Keywords"
          "identificador" => "xpalclavsec1401626"
          "palabras" => array:3 [
            0 => "Systemic lupus erythematosus"
            1 => "Latin America"
            2 => "Bibliometrics"
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            0 => "Lupus eritematoso sist&#233;mico"
            1 => "Am&#233;rica Latina"
            2 => "Bibliometr&#237;a"
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        "titulo" => "Abstract"
        "resumen" => "<span id="abst0005" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0010">Objective</span><p id="spar0005" class="elsevierStyleSimplePara elsevierViewall">To analyse the scientific production and collaboration networks on publications in systemic lupus erythematosus in Latin America&#46;</p></span> <span id="abst0010" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0015">Materials and methods</span><p id="spar0010" class="elsevierStyleSimplePara elsevierViewall">Bibliometric study between 1982 and 2018 of journals indexed in Scopus&#46; Data were analysed by annual production and a co-occurrence analysis of the collaboration between countries with VOSviewer was plotted&#46;</p></span> <span id="abst0015" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0020">Results</span><p id="spar0015" class="elsevierStyleSimplePara elsevierViewall">3843 related documents on systemic lupus erythematosus were recorded between 1982 and 2018 in Scopus&#46; An increasing trend was observed&#44; with a significant increase in the last 20 years&#44; the original articles being the highest percentage &#40;75&#46;4&#37;&#41;&#46; Eleven Latin American countries were identified in collaboration with 29 extra-regional countries&#44; with Brazil&#44; Mexico and Argentina having the highest production and scientific collaboration&#44; mainly with the United States and Spain&#46;</p></span> <span id="abst0020" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0025">Conclusion</span><p id="spar0020" class="elsevierStyleSimplePara elsevierViewall">In Latin America&#44; there is a sustained increase in research on systemic lupus erythematosus&#46; Brazil and Mexico generated more than half the publications and are the main collaboration network together with Argentina&#46;</p></span>"
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        "resumen" => "<span id="abst0025" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0035">Objetivo</span><p id="spar0025" class="elsevierStyleSimplePara elsevierViewall">Analizar la producci&#243;n cient&#237;fica y redes de colaboraci&#243;n a partir de las publicaciones sobre lupus eritematoso sist&#233;mico en Latinoam&#233;rica&#46;</p></span> <span id="abst0030" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0040">Materiales y m&#233;todos</span><p id="spar0030" class="elsevierStyleSimplePara elsevierViewall">Estudio bibliom&#233;trico de revistas publicadas entre los a&#241;os 1982 y 2018 e indizadas en Scopus&#46; Se analizaron datos por producci&#243;n anual y se represent&#243; gr&#225;ficamente&#44; mediante VOSviewer&#44; un an&#225;lisis de coocurrencia de la colaboraci&#243;n entre pa&#237;ses&#46;</p></span> <span id="abst0035" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0045">Resultados</span><p id="spar0035" class="elsevierStyleSimplePara elsevierViewall">Se registraron 3&#46;843 documentos sobre lupus eritematoso sist&#233;mico entre 1982 y 2018 en Scopus&#46; Se observ&#243; una tendencia en aumento&#44; con un incremento significativo en los &#250;ltimos 20 a&#241;os&#44; siendo los art&#237;culos originales los de mayor porcentaje &#40;75&#44;4&#37;&#41;&#46; Se identificaron 11 pa&#237;ses latinoamericanos en colaboraci&#243;n con 29 pa&#237;ses extrarregionales&#44; siendo Brasil&#44; M&#233;xico y Argentina quienes tuvieron la mayor producci&#243;n y colaboraci&#243;n cient&#237;fica&#44; principalmente con Estados Unidos y Espa&#241;a&#46;</p></span> <span id="abst0040" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0050">Conclusi&#243;n</span><p id="spar0040" class="elsevierStyleSimplePara elsevierViewall">En Latinoam&#233;rica existe un incremento sostenido en investigaci&#243;n sobre lupus eritematoso sist&#233;mico&#46; Brasil y M&#233;xico generaron m&#225;s de la mitad de las publicaciones y son la principal red de colaboraci&#243;n junto con Argentina&#46;</p></span>"
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        "nota" => "<p class="elsevierStyleNotepara" id="npar0005">Please cite this article as&#58; Mor&#225;n-Mari&#241;os C&#44; Toro-Huamanchumo CJ&#44; Pacheco-Mendoza J&#46; Perfil bibliom&#233;trico y redes de colaboraci&#243;n en investigaci&#243;n cient&#237;fica sobre lupus eritematoso sist&#233;mico en Latinoam&#233;rica&#44; 1982-2018&#46; Reumatol Clin&#46; 2021&#59;17&#58;404&#8211;407&#46;</p>"
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            "apendice" => "<p id="par0100" class="elsevierStylePara elsevierViewall">The following are the supplementary data to this article&#58;<elsevierMultimedia ident="upi0005"></elsevierMultimedia><elsevierMultimedia ident="upi0010"></elsevierMultimedia></p>"
            "etiqueta" => "Appendix A"
            "titulo" => "Supplementary data"
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          "en" => "<p id="spar0045" class="elsevierStyleSimplePara elsevierViewall">Overall scientific production tendency in Latin American countries with publications on systemic lupus erythematosus&#44; 1982&#8211;2018&#46; &#42; Others&#58; documents from congresses&#44; notes&#44; editorials&#44; short surveys and errata&#46;</p>"
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          "en" => "<p id="spar0050" class="elsevierStyleSimplePara elsevierViewall">Latin American countries that had collaborated with foreign countries in the publication of papers on systemic lupus erythematosus&#46; Analysis was weighted according to the number of documents&#44; and 40 countries were included&#46;</p>"
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                      "titulo" => "Comparing the 1997 update of the 1982 American College of Rheumatology &#40;ACR-97&#41; and the 2012 Systemic Lupus International Collaborating Clinics &#40;SLICC-12&#41; criteria for systemic lupus erythematosus &#40;SLE&#41; classification&#58; which enables earlier classification of SLE in an urban Asian population&#63;"
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                          "etal" => false
                          "autores" => array:5 [
                            0 => "A&#46;M&#46; Foma"
                            1 => "S&#46; Aslani"
                            2 => "J&#46; Karami"
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Article information
ISSN: 21735743
Original language: English
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