1. Institut d’Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS), Barcelona, Spain
2. Rheumatology Department, Hospital Del Mar/Parc de Salut Mar-IMIM, Barcelona, Spain
3. Rheumatology Department, Hospital de Bellvitge, L'Hospitalet de Llobregat, Barcelona, Spain
4. Rheumatology Department, Hospital Universitario Germans Trias I Pujol, Badalona, Spain
5. Rheumatology Department, Hospital Vall D'Hebron, Barcelona, Spain
6. Rheumatology Department, Hospital Santa Creu I Sant Pau, Barcelona, Spain
7. Rheumatology Department, Hospital Moisès Broggi, Barcelona, Spain
8. Faculty of Medicine, University of Barcelona, Barcelona, Spain