1. Dermatology and Skin Cancer Unit; Arcispedale Santa Maria Nuova IRCCS; Viale Risorgimento 80 42100 Reggio Emilia Italy
2. Department of Dermatology; University of Modena and Reggio Emilia; Modena Italy
3. Department of Dermatology and Venereology; Medical University of Graz; Graz Austria