1. Department of Pathophysiology and Transplantation, Università degli Studi di Milano, 20122 Milan, Italy
2. Dermatology Unit, Fondazione IRCCS Ca’ Granda Ospedale Maggiore Policlinico, 20122 Milan, Italy
3. Department of Pediatrics, Fondazione IRCCS San Gerardo dei Tintori, 20900 Monza, Italy
4. Pediatric Dermatology Unit, Department of Clinical Sciences and Community Health, Fondazione IRCCS Ca’ Granda Ospedale Maggiore Policlinico, 20122 Milan, Italy