1. Dermatology Unit, San Bortolo Hospital, Vicenza, Italy
2. Centro Studi GISED (Italian Group for Epidemiologic Research in Dermatology) - FROM (Research Foundation of Ospedale Maggiore Bergamo), Padiglione Mazzoleni - Presidio Ospedaliero Matteo Rota, Bergamo, Italy
3. Dermatology Unit, Department of Medicine, University of Padova, Padova, Italy