1. Division of Rheumatology, Department of Medicine, University of Udine , Udine, Italy
2. Institute of Statistics, Department of Medicine, University of Udine , Udine, Italy
3. Rheumatology Unit, Department of Medicine DIMED, University of Padua , Padova, Italy
4. Department of Experimental and Clinical Medicine, University of Florence , Florence, Italy
5. Department of Internal Medicine and Therapeutics, Università di Pavia , Pavia, Italy
6. Division of Rheumatology, Fondazione IRCCS Policlinico San Matteo , Pavia, Italy
7. IRCCS San Raffaele Scientific Institute, Unit of Immunology, Rheumatology, Allergy and Rare Diseases (UnIRAR) , Milano, Italy
8. Rheumatology Unit, University of Verona , Verona, Italy
9. Division of Clinical Rheumatology, ASST Istituto Gaetano Pini—CTO , Milano, Italy
10. Azienda USL-IRCCS di Reggio Emilia and University of Modena and Reggio Emilia , Reggio Emilia, Italy
11. Department of Clinical Internal, Anesthesiological and Cardiovascular Sciences, Rheumatology Unit, Sapienza University of Rome , Rome, Italy
12. Rheumatology and Clinical Immunology Unit, ASST Spedali Civili, and Department of Clinical and Experimental Sciences, University of Brescia , Brescia, Italy
13. Rheumatology Unit, Department of Clinical and Experimental Medicine, University of Pisa , Pisa, Italy
14. Rheumatology Unit, University of Modena and Reggio Emilia , Modena, Italy
15. Rheumatology and Clinical Immunology, Humanitas Clinical and Research Center—IRCCS , Rozzano, Milano, Italy
16. Center for Medical Sciences (CISMed), University of Trento, and Rheumatology Unit, Santa Chiara Hospital , APSS Trento, Italy
17. Rheumatology Unit, Department of Medicine, Surgery and Neurosciences, University of Siena , Siena, Italy
18. Rheumatology Unit, Department of Clinical and Experimental Medicine, University of Florence , Italy
19. Rheumatology Unit, Garibaldi Hospital , Catania, Italy
20. Department of Biomedical Sciences, Humanitas University , Milano, Italy
21. Centre for Inflammatory Diseases, Monash University Department of Medicine, Monash Medical Centre , Clayton, Victoria, Australia