Effectiveness of intravenous tocilizumab in routine clinical practice in a cohort of Costa Rican patients with rheumatoid arthritis Mauricio Cordero-Alfaro; Carlos León-Céspedes; Allan Ramos-Esquivel;

Efficacy and safety of combined therapy with synthetic disease-modifying antirheumatic drugs in rheumatoid arthritis: Systematic literature review Jaime Calvo Alén; Trinidad Pérez; Susana Romero Yuste; Iván Ferraz-Amaro; Juan José Alegre Sancho; José Antonio Pinto Tasende; Francisco Maceiras Pan; Juan Carlos Quevedo; M. Vanesa Hernández-Hernández; Cristina Hidalgo Calleja; Alejandro San Martín Álvarez; María Isabel Tevar Sánchez; Raimon Sanmartí;

Fibromyalgia with elevated rheumatoid factor is associated with poor therapeutic response but not with progression to rheumatoid arthritis. Prospective cohort study Freddy Liñán Ponce; Juan Leiva Goicochea; David Sevilla Rodríguez; Elmer Hidalgo Bravo; Ginna Obregón Atanacio; Inés Loyola Macalapú; Paola Jáuregui Rojas; Jackeline Yampufe Canani;