Macrophage activation syndrome as a result of rheumatological diseases: Report of 4 cases Lina María Saldarriaga Rivera; Nicolás Sánchez-Ramírez; Laura Rodríguez-Conde; Diana Paola Tejedor-Restrepo;

Characterization of patients under 18 years of age with lupus nephritis at the Pablo Tobón Uribe Hospital and at the San Vicente Fundación Hospital in the city of Medellín between 2008 and 2017 Lorena Quiñones-Ríos; Mayra Alejandra Estévez Capacho; Laura Fernanda Niño Serna; Lady Johana Hernández Zapata; Ruth María Eraso Garnica; Catalina Vélez Echeverri; Richard Baquero Rodríguez;

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;