The patient journey of fibromyalgia in Latin America Teresa Otón; Osvaldo Daniel Messina; Daniel G. Fernández Ávila; Manuel Robles San Román; Darío Mata; Constanza Arguissain; Jorge Miguel Galindo Guzmán; Marina Pérez; Loreto Carmona;

Disease burden and costs for patients with hip and knee osteoarthritis and chronic moderate-to-severe refractory pain on treatment with strong opioids in Spain Antoni Sicras-Mainar; Javier Rejas-Gutierrez; Francisco Vargas-Negrín; Juan Carlos Tornero-Tornero; Aram Sicras-Navarro; Isabel Lizarraga;

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;