Spondyloarthritis: Characterization of a cohort. Pablo Tobón Uribe Hospital. Medellín, Colombia Javier D. Márquez-Hernández; Andrés Felipe Echeverri-García; Mauricio Restrepo-Escobar; María Fernanda Álvarez Barreneche; Alejandro Hurtado; Luis Fernando Pinto-Peñaranda;

Factors associated with the use of tumor necrosis factor alpha inhibitors in a population of Colombian patients with spondyloarthritis Luis Fernando Pinto-Peñaranda; Andrés Felipe Echeverri-García; Mauricio Restrepo-Escobar; María Fernanda Álvarez Barreneche; Alejandro Hurtado; Javier D. Márquez-Hernández;

Development and internal validation of a clinical prediction model of the risk of nosocomial bacterial infection in patients with systemic lupus erythematosus Mauricio Restrepo-Escobar; Pablo Castaño-González; Marianella Galvis-García; Laura Morales-Maya; Tomás Urrego; Simón Sandoval-Álvarez; Carlos H. Muñoz-Vahos; Adriana L. Vanegas-García; Daniel Jaramillo-Arroyave; Gloria Vásquez; Luis A. González-Naranjo;