1. Medical School; Rheumatology Unit, Hospital Universitario San Ignacio, Pontificia Universidad Javeriana; Bogota Colombia
2. Clinical Epidemiology and Biostatistics Department, Medical School; Pontificia Universidad Javeriana; Bogota Colombia
3. Rheumatology Service; Hospital Universitario de La Samaritana; Bogota Colombia
4. Javesalud IPS; Bogota Colombia