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

Effect of the Coexistence of Fibromyalgia in the DAS28 Index in Women With Rheumatoid Arthritis Daniel Roig Vilaseca, Carmen Hoces Otero

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