1. Department of Dermatology; University of Rome Tor Vergata; Viale Oxford; 81 - 00133; Rome; Italy
2. Section of Dermatology and Venereology; Department of Medicine; University of Verona; Verona; Italy
3. Unit of Dermatology and Venereology; Department of Biomedical Sciences and Human Oncology; University of Bari; Bari; Italy
4. Informa s.r.l.; Rome; Italy