1. Rheumatology Unit, Department of Clinical Medicine and Surgery, University Federico II, Naples, Italy
2. Rheumatology, Allergology and Clinical Immunology, Department of System Medicine, University of Rome Tor Vergata, Rome, Italy
3. Unit of Allergology, Clinical Immunology and Rheumatology, Università Campus Bio-Medico di Roma, Rome, Italy
4. Rheumatology Unit, Department of Biotechnological and Applied Clinical Sciences, University of L’Aquila, L’Aquila, Italy
5. Department of Rheumatology, Azienda USL-IRCCS di Reggio Emilia, Reggio Emilia, Italy