Extension of the RENACER Study: 12-Month Efficacy, Safety and Certolizumab PEGol Survival in 501 Rheumatoid Arthritis Patients Vicenç Torrente-Segarra; Manuel Fernández Prada; Rosa Expósito; Noemí Patricia Garrido Puñal; Amalia Sánchez-Andrade; José Ramón Lamúa-Riazuelo; Alejandro Olivé; Juan Víctor Tovar;