1. 1st Department of Pathology, Medical School, National and Kapodistrian University of Athens, 11527 Athens, Greece
2. Cancer Epidemiology Unit, Department of Medical Sciences, University of Turin, 10126 Turin, Italy
3. Oncologic Dermatology Unit, IRCCS Azienda Ospedaliero-Universitaria di Bologna, 40138 Bologna, Italy
4. Department of Medical and Surgical Sciences (DIMEC), University of Bologna, 40138 Bologna, Italy
5. Dermatology Department, Hospital Universitari Germans Trias i Pujol, Institut d’Investigació Germans Trias i Pujol, 08916 Badalona, Spain
6. Melanoma Unit, Dermatology Department, Hospital Clinic, Universitat de Barcelona, Institut d’ Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS), 08036 Barcelona, Spain
7. CIBER de Enfermedades Raras, Instituto de Salud Carlos III, 28029 Barcelona, Spain
8. Dermatology Department, Instituto Valenciano de Oncología, 46009 Valencia, Spain
9. Dermatology Clinic, Medical Sciences Department, University of Turin, 10126 Turin, Italy
10. Pathology Unit, Department of Oncology, University of Turin, 10124 Turin, Italy