[1] Univ Libre Bruxelles, Hop Erasme, Dept Dermatol, HUB, Brussels, Belgium
[2] Univ Cattolica Sacro Cuore, Dept Dermatol, Rome, Italy
[3] Univ Siena, Dept Med Surg & Neurol Sci, Dermatol Unit, Siena, Italy
[4] Grp Imagerie Cutanee Non Invas GICNI Soc Francaise, Paris, France
[5] Univ Hosp St Etienne, Dept Dermatol, St Etienne, France
[6] Univ Barcelona, Hosp Clin Barcelona, Melanoma Unit, Barcelona, Spain
[7] Inst Salud Carlos III, CIBER enfermedades raras, Barcelona, Spain
[8] Univ Libre Bruxelles, Inst Jules Bordet, Dept Dermatol, HUB, Brussels, Belgium
[9] Univ Libre Bruxelles, Hop Erasme, Dept Dermatol, HUB, 808 Route Lennik, B-1070 Brussels, Belgium