1 Department of Internal Medicine and Therapeutics, University of Pavia, and Division of Rheumatology, Fondazione IRCCS Policlinico San Matteo,Pavia, Italy.
2 Rheumatology Unit, Department of Clinical and Experimental Medicine, University of Pisa, Italy.
3 Immunology and Allergology Unit, Department of Clinical and Experimental Medicine, University of Pisa, Italy. [email protected].