1. Department of Dermatology; University Hospital of Saint Etienne; Saint Etienne France
2. Department of Pathology; University Hospital of Saint Etienne; Saint Etienne France
3. Skin Cancer Unit; Arcispedale S. Maria Nuova-IRCCS; Reggio Emilia Italy
4. Department of Dermatology; University of Modena and Reggio Emilia; Modena Italy