1. Skin Cancer Unit; Arcispedale S. Maria Nuova-IRCCS; Reggio Emilia Italy
2. Section of Dermatology; Department of Medical Sciences; University of Turin; Turin Italy
3. Pathology Unit; Arcispedale S. Maria Nuova-IRCCS; Reggio Emilia Italy
4. Melanoma Unit; Dermatology and Pathology Departments; Hospital Clínic Barcelona; Universitat de Barcelona; Barcelona Spain
5. CIBER of Rare Diseases; Instituto de Salud Carlos III; Barcelona Spain
6. Department of Dermatology; Division of General Dermatology; Medical University of Vienna; Vienna Austria
7. Non-Melanoma Skin Cancer Unit; Department of Dermatology and Venerology; Medical University of Graz; Graz Austria
8. Clinic for Dermatology; Allergology; and Environmental Medicine; Klinik Thalkirchner Straße Städt; Klinikum München GmbH; Munich Germany
9. Department of Dermatology; Sheba Medical Center; Sackler School of Medicine; Tel Aviv University; Tel Aviv Israel
10. Department of Dermatology; University of Modena; Reggio Emilia Italy
11. Division of Dermatology; Department of Experimental; Diagnostic and Specialty Medicine; University of Bologna; Bologna Italy
12. Dermatology Unit; Second University of Naples; Naples Italy