1 DISSAL, Department of Dermatology, Policlinico San Martino, Largo Rosanna Benzi, 10, 16132 Genoa, Italy.
2 DISSAL, Department of Dermatology, Policlinico San Martino, Largo Rosanna Benzi, 10, 16132 Genoa, Italy. Electronic address: giuliaciccarese@libero.it.