Survival of first line biological and targeted synthetic disease-modifying anti-rheumatic drugs in patients with rheumatoid arthritis in Chile Marcos Cruces Olivar, Allan D. Burboa, Yolanda M. Gómez

Costs of the standard rheumatology care in active rheumatoid arthritis patients seen in a tertiary care center in Mexico City Blanca Hernández-Cruz, Rafael Ariza-Ariza, Mario H. Cardiel-Ríos

Baseline comorbidities in patients with rheumatoid arthritis who have been prescribed biological therapy: A case control study Pilar Espiño-Lorenzo, Sara Manrique-Arija, Inmaculada Ureña, Francisco Gabriel Jiménez-Núñez, María López-Lasanta, Carmen María Romero-Barco, María Angeles Belmonte-López, María Victoria Irigoyen, Antonio Fernández-Nebro