1. Rheumatology Unit, Department of Clinical and Experimental Medicine, University of Pisa, Italy. francesca3ntin@gmail.com
2. Rheumatology Unit, Department of Clinical and Experimental Medicine, University of Pisa, Italy.
3. Rheumatology Unit, Department of Clinical and Experimental Medicine, University of Pisa, and Department of Medical Biotechnologies, University of Siena, Italy.
4. Rheumatology Unit, Department of Medical Sciences, University of Ferrara and Azienda Ospedaliero-Universitaria S. Anna, Ferrara, Italy.