1. Dermatology Unit, U.O.C. Dermatologia e Centro Angiomi, IRCCS Istituto Giannina Gaslini, Via Gerolamo Gaslini 5, 16147 Genova, Italy
2. Dermatology Unit, Department of Medical and Surgical Sciences, University of Foggia and Ospedali Riuniti, Viale Luigi Pinto, 71122 Foggia, Italy
3. Department of Dermatology, DISSAL, University of Genova, 16132 Genova, Italy