Clinical features of patients with hands arthralgia referred from primary care physicians to rheumatologists: A cohort study Gabriel Figueroa-Parra; Martha Mariana Castañeda-Martinez; Pablo Herrera-Sandate; Diana Daniela Castañeda-Martinez; Jorge Antonio Esquivel-Valerio; David Vega-Morales;

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;

Ultrasound tenosynovitis: A differential feature of patients with seronegative rheumatoid arthritis Santiago Ruta; Einer Sanchez Prado; Facundo Salvatori; Juan Arguello; Darío Aguerre; Sebastián Magri; Rodrigo García Salinas;