1. Dermatology Unit Ospedale San Bortolo Vicenza Italy
2. A Study Centre of the Italian Group for the Epidemiologic Research in Dermatology (GISED) Bergamo Italy
3. Section of Dermatology and Venereology, Department of Medicine University of Verona Verona Italy
4. Dermatology Unit, Department of Mental and Physical Health and Preventive Medicine University of Campania Luigi Vanvitelli Naples Italy
5. Section of Dermatology, Department of Medicine University of Brescia Brescia Italy
6. Dermatology Unit Fondazione Ca’ Granda Ospedale Maggiore Policlinico Milan Italy
7. Department of Pathophysiology and Transplantation Università degli Studi di Milano Milan Italy