1. Department of Pathophysiology and Transplantation, University of Milan, 20122 Milan, Italy
2. Section of Dermatology and Venereology, Department of Medicine, University of Verona, 30127 Verona, Italy
3. Dermatology Unit, Foundation IRCCS, Ca’ Granda Ospedale Maggiore Policlinico, Via Pace 9, 20122 Milan, Italy