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;

Patient-reported outcomes in RA patients treated with tofacitinib or bDMARDs in real-life conditions in two Latin American countries J.M. Reyes; M.V. Gutierrez; H. Madariaga; W. Otero; R. Guzman; J. Izquierdo; M. Abello; P. Velez; D. Castillo; D. Ponce de Leon; T. Lukic; L. Amador;

Association of electrocardiographic altered P wave dispersion and vascular endothelial growth factor in rheumatoid arthritis Osmar Antonio Centurión; Paloma de Abreu; Gabriela Avila-Pedretti; Sonia R. Cabrera; María T. Martínez de Filártiga; Astrid Paats; Judith M. Torales; Christian O. Chávez; Carmen R. Montiel; Laura B. García; Karina E. Scavenius; Rocío del Pilar Falcón; Jose C. Candia; Alfredo J. Meza; Isabel Acosta-Colmán;