[1] Univ Pavia, Dept Clin Surg Diagnost & Pediat Sci, Viale Camillo Golgi 19, I-27100 Pavia, Italy
[2] Osped Cardinal Massaia, Dermatol Unit, Asti, Italy
[3] Osped Cardinal Massaia, Pathol Unit, Asti, Italy
[4] Fdn IRCCS Policlin San Matteo, Dermatol Clin, Pavia, Italy