Utility of anti-C1q and anti-nucleosome antibodies in systemic lupus erythematosus and lupus nephritis in southwestern Colombia Tatiana Méndez-Rayo; Iván Posso-Osorio; Ivana Nieto-Aristizábal; Cristian C. Aragón; Juan Naranjo-Escobar; Ingrid Ruiz-Ordoñez; Alex Echeverri; Gloria L. Castaño; Carlos A. Cañas; Carmen M. Castillo; Gabriel J. Tobón;

Rowell syndrome: Case report and review of the literature Paula Andrea Chacón-Jaramillo; Johana Andrea Gil-Ovalle; David Castillo-Molina; Rubén Darío Mantilla;

Frequency of anti-neutrophil cytoplasmic antibodies in patients with systemic lupus erythematosus Evelyn Santacruz-Sandoval; Cristian C. Aragón; Ivana Nieto-Aristizábal; Ingrid Ruiz-Ordoñez; Jhoan S. Quijano; Daniela Ramírez-Castillo; Karen Mondragón M; Iván Posso-Osorio; María Claudia Barrera; Lady J. Rios-Serna; Gabriel J. Tobón;