1. Department of Medicine Section of Dermatology and Venereology University of Verona Verona Italy
2. Dermatology Unit Department of Medicine University of Padua Padua Italy
3. Department of Surgical, Medical, Dental and Morphological Sciences related to Transplant, Oncology and Regenerative Medicine Dermatology Unit University of Modena and Reggio Emilia Modena Italy
4. Study Centre of the Italian Group for the Epidemiologic Research in Dermatology (GISED) Bergamo Italy
5. Department of Dermatology San Bortolo Hospital Vicenza Italy