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;

Association between vitamin D deficiency and disease activity in Paraguayan patients with systemic lupus erythematosus Isabel Acosta-Colman; Zoilo Morel; Astrid Paats; Nelson Ortíz; Lourdes Román; Marcos Vázquez; Margarita Duarte; Gabriela Ávila-Pedretti; María Eugenia Acosta; María Teresa Martínez de Filártiga;

Clinical and immunological factors associated with lupus nephritis in an Argentine patient population: A cross-sectional study Jorge Luis Téllez Noriega; Victoria Basso; Nora Fuentes; Florencia Vivero;