Cognitive dysfunction, depression and serum level of brain-derived neurotrophic factor (BDNF) in Egyptian patients with rheumatoid arthritis Mona I. Nabih; Noha M. Khalil; Olfat Shaker; Mahmoud Ghanema; Sarah A. Hassan;

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;

Comorbidities in Mexican Mestizo patients with rheumatoid arthritis: A cross-sectional study of 523 patients in a preventive cardio-rheumatology clinic Rosa I. Arvizu-Rivera; Jesus A. Cardenas-de la Garza; Valeria Gonzalez-Gonzalez; Dionicio A. Galarza-Delgado; Jose R. Azpiri-Lopez; Andrea L. Guajardo-Aldaco; Maria F. Elizondo-Benitez; Iris J. Colunga-Pedraza;