1. Department of Dermatology; University of L'Aquila; L'Aquila Italy
2. Dermatology and Skin Cancer Unit; Arcispedale Santa Maria Nuova - IRCCS; Reggio Emilia Italy
3. Department of Dermatology; University of Modena and Reggio Emilia; Modena Italy
4. Department of Dermatology; University of Graz; Graz Austria
5. Department of Dermatology; Centre Hospitalier Lyon Sud; Université Claude Bernard Lyon 1; Lyon France
6. Department of Oncologic Dermatology; San Gallicano Dermatological Institute; Rome Italy
7. Department of Dermatology; Hospital Universitario Central de Asturias; Oviedo Spain