1. Department of Medical Sciences; Section of Dermatology, University of Turin; Turin Italy
2. Department of Medical Sciences; Section of Pathology, University of Turin; Turin Italy
3. Department of Oncology and Haematology; Section of Dermatologic Surgery, Città della Salute e della Scienza di Torino Hospital; Turin Italy
4. Department of Medical Sciences; Unit of Cancer Epidemiology - CERMS, University of Turin; Turin Italy
5. Department of Oncology and Haematology; Section of Dermatopathology, Città della Salute e della Scienza di Torino Hospital; Turin Italy