Subclinical hip involvement in rheumatoid arthritis. An ultrasound assessment Vladimir Aroja Santos; Jessica Gutiérrez; Hugo Sandoval; Araceli Bernal-González; Melisa Valdivieso-Ruiz; Sandra Rodríguez-Flores; Mariana Moreno Ramírez; Aarón Daniel Antonio Arrieta Aguilar; Marwin Gutiérrez; Carlos Pineda;

The coexistence of rheumatoid arthritis and ankylosing spondylitis: Case series and literature review Hanene Lassoued Ferjani; Ben Ayed Hiba; Dorra Ben Nessib; Dhia Kaffel; Kaouther Maatallah; Wafa Hamdi;

Cost-effectiveness analysis of the early versus established phase clinical approach in a cohort of patients with rheumatoid arthritis in a fourth level health care institution in Colombia Carolina Sarmiento-Peña; Gerardo Quintana-López;