1. Unit of Dermatology, Department of Medical and Oncology Area, University of Pisa, Pisa, Italy
2. Melanoma and Skin Cancer Unit AVNO (Area Vasta Nord Ovest) Toscana, New Apuan Hospital, Pisa, Italy
3. Unit of Dermatology, Department of Medical and Surgical Sciences, University of Foggia, Foggia, Italy
4. Unit of Dermatology, Hospital of Livorno, Livorno, Italy