| Affiliation: | 1. Internal Medicine Department, Vall d''Hebron General Hospital, Barcelona, Spain;2. Departament de Medicina, Universitat Autónoma de Barcelona, Barcelona, Spain;3. Preventive Medicine and Epidemiology, Vall d''Hebron General Hospital, Universitat Autonoma de Barcelona, Spain;4. National Institute of Arthritis and Musculoskeletal and Skin Diseases, National Institutes of Health, Bethesda, Johns Hopkins University School of Medicine, Baltimore, United States;5. Faculty of Health Sciences, Universitat Oberta de Catalunya, Barcelona, Spain;6. Nuclear Medicine Department, Vall d''Hebron General Hospital, Barcelona, Spain;7. Rheumatology Department, Vall d''Hebron General Hospital, Calle Benet Cortada 38, Piso3, Puerta 1, Sant Cugat del Vallés, Barcelona 08174, Spain |
