1. Rheumatology Department, Hospital Guillermo Almenara Irigoyen, EsSalud, Lima, Perú
2. School of Medicine, Universidad Científica del Sur, Lima, Perú
3. Division of Rheumatology, Department of Internal Medicine, School of Medicine, Universidad de Antioquia, Medellín, Colombia
4. Department of Medicine, Division of Clinical Immunology and Rheumatology, The University of Alabama at Birmingham, Birmingham, USA
5. School of Medicine, Universidad Peruana Cayetano Heredia, Lima, Perú