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;

Immunological profile in biopsies of primary angiitis of the central nervous system Iván Posso-Osorio; Daniela Espinosa-Cárdenas; David Aguirre-Valencia; Juan Naranjo-Escobar; Luis-Alberto Escobar; Carlos A. Cañas; Gabriel J. Tobón;

Antinuclear antibody staining patterns by indirect immunofluorescence assay observed in patients from a tertiary health center in Latin America Valeria Erazo-Martínez; Daniela Peñaloza; Julián Rosero; Iván Posso-Osorio; Carmen Manuela Castillo; Helen Johana Ortiz-Rojas; Gabriel J. Tobón;