1. Rheumatology Department, Hospital of Prato, Prato Italy
2. Translational Research Unit, Department of Epidemiology and Preclinical Research, “L. Spallanzani” National Institute for Infectious Diseases (INMI), IRCCS, Via,Portuense 292, 00149 Rome, Italy
3. Rheumatology Unit, Hospital S. Giovanni di Dio, Azienda USL-Toscana Centro, Florence, Italy
4. Rheumatology Unit, Vittorio-Emanuele University Hospital of Catania, Catania, Italy
5. Rheumatology Unit, Department of Clinical and Experimental Medicine, University of Florence, Florence, Italy