1. Division of Medical Oncology - Preventive Oncology; Centro di Riferimento Oncologico; National Cancer Institute; Aviano Italy
2. Department of Dermatology; Medical University of Vienna; Vienna Austria
3. Skin Cancer Unit; Istituto Tumori Romagna (IRST), Meldola; Department of Dermatology; University of Parma; Italy
4. IRCCS San Martino - 1st Clinic of Dermatology; Genova Italy
5. Division of Dermatology; Pordenone Hospital; Pordenone Italy
6. Department of Dermatology; University of Siena; Siena Italy
7. Department of Dermatology; Fondazione Ospedale Maggiore Policlinico IRCCS; Milan Italy
8. Department of Dermatology; University of Florence; Florence Italy
9. Istituto Dermopatico Immacolata; IRCCS; Rome Italy
10. Department of Dermatology; University of Padova; Italy
11. Division of Dermatology; Celio Hospital; Rome Italy
12. National Cancer Institute; ‘Fondazione G. Pascale’-IRCCS; Naples Italy
13. Dermatologic Clinic; Department of Medical Sciences; University of Torino; Torino Italy
14. Department of Dermatology; University of Modena and Reggio Emilia; Modena Italy
15. Dermatology Unit; Second University of Naples; Naples Italy
16. Skin Cancer Unit; Arcispedale Santa Maria Nuova IRCCS; Reggio Emilia Italy
17. Unit of Epidemiology and Biostatistics; Centro di Riferimento Oncologico; National Cancer Institute; Aviano Italy