[1] Univ Siena, Dept Med Surg & Neurol Sci, S Maria Alle Scotte Hosp, Dermatol Sect, Viale Bracci 16, I-53100 Siena, Italy
[2] Univ Siena, Epidemiol Hyg & Publ Hlth Unit, Siena, Italy
[3] IRCCS, San Gallicano Dermatol Inst, Dermatol Clin, Rome, Italy
[4] Alcala Univ, Med & Med Special Dept, Madrid, Spain
[5] Azienda Osped Spedali Civili Brescia, Dept Dermatol, Brescia, Italy
[6] Univ Turin, Dept Med Sci, Dermatol Clin, Turin, Italy
[7] Univ Modena & Reggio Emilia, Dept Dermatol, Modena, Italy
[8] Univ Catania, Dermatol Clin, Catania, Italy
[9] Ist Sci Romagnolo Studio & Cura Tumori, Skin Canc Unit, Meldola, Italy
[10] Univ Trieste, Dermatol Clin, Maggiore Hosp, Trieste, Italy
[11] Ctr Oncol Ad Alta Tecnol Diagnost Dermatol, Azienda Unita Sanit Locale IRCCS Reggio Emilia, Reggio Emilia, Italy
[12] Univ Sydney, Dept Dermatol, Sydney Melanoma Diagnost Ctr, Sydney, NSW, Australia
[13] Melanoma Inst Australia, Sydney, NSW, Australia
[14] Univ Hosp Graz, Dept Dermatol, Graz, Austria
[15] Hop Archet 2, Dept Dermatol, Clin Res Ctr, Nice, France
[16] Univ Hosp St Etienne, Dept Dermatol, St Etienne, France