Experts document on methotrexate use in combined therapy with biological or targeted synthetic disease modifying drugs in patients with rheumatoid arthritis Jesús Tornero-Molina; Mercedes Alperi-López; Ivan Castellví; Juan José de Agustín-de Oro; Alejandro Escudero; Rosario García-Vicuña; Miguel Ángel González-Gay; Cristina Hidalgo; Esteban Rubio; Raimon Sanmartí; Núria Casamira; Jaime Calvo-Alén;

Effectiveness of intravenous tocilizumab in routine clinical practice in a cohort of Costa Rican patients with rheumatoid arthritis Mauricio Cordero-Alfaro; Carlos León-Céspedes; Allan Ramos-Esquivel;

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;