1. Skin Cancer Unit; Arcispedale S. Maria Nuova-IRCCS; Reggio Emilia Italy
2. Department of Medical Sciences, Section of Dermatology; University of Turin; Turin Italy
3. Department of Dermatology; Catholic University; Rome Italy
4. Pathology Unit; Arcispedale S. Maria Nuova-IRCCS; Reggio Emilia Italy
5. Dermatology Unit; Second University of Naples; Naples Italy