1 Unit of Dermatology, Department of Pathophysiology and Transplantation, Foundation IRCCS Ca' Granda Ospedale Maggiore Policlinico, Milan, Italy - stefano.veraldi@unimi.it.
2 Unit of Dermatology, Department of Pathophysiology and Transplantation, Foundation IRCCS Ca' Granda Ospedale Maggiore Policlinico, Milan, Italy.
3 European Institute of Dermatology, Milan, Italy.