1. Rheumatology Unit, Department of General and Specialistic Medicine, Azienda Ospedaliera Universitaria Città della Salute e della Scienza di Torino, and University of Padova, PhD Program in Clinical and Experimental Sciences, Padova, Italy.
2. Rheumatology Unit, Department of General and Specialistic Medicine, Azienda Ospedaliera Universitaria Città della Salute e della Scienza di Torino, Turin, Italy. simone.parisi@hotmail.it
3. Rheumatology Unit, Department of Internal Medicine, San Gerardo Hospital, Monza, Italy.
4. Rheumatology Unit, Department of Clinical and Experimental Medicine, University of Messina, Azienda Ospedaliera Gaetano Martino, Messina, Italy.
5. Rheumatology Unit, Department of Internal Medicine, Ospedale di Circolo - Fondazione Macchi, ASST-Settelaghi, Varese, Italy.
6. Rheumatology Unit, University Hospital ASST-Fatebenefratelli-Sacco, Milan, Italy.
7. Rheumatology and Clinical Immunology Unit and Department of Clinical and Experimental Sciences, Spedali Civili and University of Brescia, Italy.
8. Rheumatology Unit, Department of General and Specialistic Medicine, Azienda Ospedaliera Universitaria Città della Salute e della Scienza di Torino, Turin, Italy.