1. Rheumatology Unit; Department of Biotechnological and Applied Clinical Sciences; University of L'Aquila; L'Aquila Italy
2. Rheumatology, Allergology and Clinical Immunology; Department of “Medicina dei Sistemi”; University of Rome Tor Vergata; Rome Italy
3. Department of Dermatology; University of L'Aquila; L'Aquila Italy
4. Department of Dermatology; Catholic University; Rome Italy