1. Department of Dermatology; Faculty of Medicine; University of Tokyo; Tokyo Japan
2. Dermatology and Skin Cancer Unit; Arcispedale Santa Maria Nuova; IRCCS; Viale Risorgimento 80 42100 Reggio Emilia Italy
3. Department of Dermatology; University of Modena and Reggio Emilia; Modena Italy
4. Department of Dermatology; Medical University of Graz; Graz Austria
5. Dermatology Unit; Second University of Naples; Naples Italy