1. Division of Rheumatology, University of Pavia, IRCCS Policlinico San Matteo Foundation, Pavia
2. Department of Rheumatology, Gaetano Pini Institute, Milan
3. Department of Emergency and Organ Transplantation (DETO), University of Bari, Section of Rheumatology, Bari
4. Rheumatology Department of Lucania, San Carlo Hospital of Potenza and Madonna delle Grazie Hospital of Matera. Basilicata Ricerca Biomedica (BRB) Foundation, Potenza
5. Rheumatology Unit, S. Giovanni di Dio Hospital, Florence
6. Rheumatology Unit, University Clinic and AOU of Cagliari, Cagliari
7. Rheumatology Service ASL BT – DSS4 Barletta
8. Fondazione Ospedale San Camillo – Roma
9. Reumatologia Ospedaliera, Dipartimento Internistico, A.O.U. ‘OO.RR’ – Foggia
10. Institute of Rheumatology, Fondazione Policlinico Universitario Agostino Gemelli, Catholic University of the Sacred Heart, Rome, Italy