1. Department of Rheumatology, School of Medicine, University of Los Andes, Santiago, Chile
2. Clinical Immunology and Osteoarticular Diseases Therapeutic Unit, CHU Lapeyronie, Montpellier, France
3. Clinical Immunology and Osteoarticular Diseases Therapeutic Unit, CHU Lapeyronie, 371, avenue du doyen Gaston Giraud, 34295 Montpellier, France