Fabio Cacciapaglia1, Andreina Manfredi2, Gianluca Erre3, Matteo Piga4, Garifallia Sakellariou5, Ombretta Viapiana6, Elisa Gremese7,8, Francesca Romana Spinelli9, Fabiola Atzeni10, Elena Bartoloni11. 1. Rheumatology Unit - Department of Emergence Medicine and Transplantation (DETO), Università degli Studi di Bari Facoltà di Medicina e Chirurgia, Bari, Puglia, Italy fabio.cacciapaglia79@gmail.com. 2. Internal Medicine, University of Modena and Reggio Emilia, Modena, Italy. 3. Specialità Mediche - Azienda Ospedaliero Universitaria di Sassari, UOC Reumatologia, Sassari, Italy. 4. Chair and Rheumatology Unit, University Clinic AOU Cagliari, Monserrato, CA, Italy. 5. Division of Rheumatology, University of Pavia, IRCCS Policlinico San Matteo Foundation, Pavia, Italy. 6. Division of Rheumatology, Department of Medicine, University and Azienda Ospedaliera Universitaria Integrata of Verona, Verona, Italy. 7. Division of Rheumatology, Fondazione Policlinico Universitario A. Gemelli IRCCS, Rome, Italy. 8. Institute of Rheumatology, Università Cattolica del Sacro Cuore. 9. Dipartimento di Medicina Interna e Specialità Mediche - Reumatologia, Universita degli Studi di Roma La Sapienza, Roma, Italy. 10. Rheumatology Unit, University of Messina Faculty of Medicine and Surgery, Messina, Sicilia, Italy. 11. Department of Medicine, University of Perugia, Rheumatology Unit, Perugia, Italy.