1. Dermatology Unit, Department of Biotechnological and Applied Clinical Science, University of L’Aquila, L’Aquila, Italy
2. Rheumatology Unit, Department of Biotechnological and Applied Clinical Science, School of Medicine, University of L’Aquila, L’Aquila, Italy
3. Department of Medicine, ASL1 Avezzano-Sulmona-L’Aquila, L’Aquila, Italy
4. Department of Dermatology, University of Rome Tor Vergata, Rome, Italy
5. Rheumatology Unit, Department of Medicine, University of Perugia, Perugia, Italy