1. Rheumatology Unit, Department of Medicine and Surgery, University of Perugia, Italy.
2. Department of Pathophysiology, Athens School of Medicine, National and Kapodistrian University of Athens, and Institute for Autoimmune Systemic and Neurological Diseases, Athens, Greece.
3. Rheumatology Unit, Department of Clinical and Experimental Medicine, University of Pisa, Italy.
4. Rheumatology Unit, Department of Clinical and Experimental Medicine, University of Pisa, Italy. chiara.baldini74@gmail.com