1. Cancer Risk Factors and Lifestyle Epidemiology Unit, Institute for Cancer Research Prevention and Clinical Network Florence Italy
2. Department of Experimental Oncology, European Institute of Oncology IRCCS Milan Italy
3. Department of Health Sciences, Section of Pathological Anatomy University of Florence Florence Italy
4. Division of Medical Oncology of Melanoma, Sarcoma and Rare Tumors, European Institute of Oncology IRCCS Milan Italy
5. Skin Cancer Unit, Scientific Institute of Romagna for the Study and Treatment of Cancer IRCSS Meldola Italy
6. Department of Dermatology University of Parma Parma Italy