1. Clinical Dermatology Department IRCCS S. Gallicano Dermatological Institute Rome Italy
2. Clinical Dermatology IRCCS Istituto Ortopedico Galeazzi Milan Italy
3. Department of Biomedical Surgical and Dental Sciences University of Milan Milan Italy
4. Dermatology Unit Azienda Ospedaliera San Donato Milanese Milan Italy
5. Study Centre of the Italian Group for Epidemiologic Research in Dermatology (GISED) Bergamo Italy
6. Department of Pharmaceutical and Pharmacological Sciences University of Padua Padua Italy