Can we predict the risk factors for switching due to ineffectiveness in the first year of therapy with bDMARD in patients with rheumatoid arthritis? Ana Martins; Sofia Pimenta; Daniela Oliveira; Rafaela Nicolau; Alexandra Bernardo; Teresa Martins Rocha; Lúcia Costa; Miguel Bernardes;

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;

Validation of a Spanish version of the Health Assessment Questionnaire-II to assess Mexican patients¿ physical function with rheumatoid arthritis Gabriel Horta-Baas;