1 Dermatology Unit, Fondazione IRCCS Ca' Granda Ospedale Maggiore Policlinico, Milan, Italy; Department of Pathophysiology and Transplantation, Università degli Studi di Milano, Italy. Electronic address: angelo.marzano@unimi.it.
2 Dermatology Unit, Fondazione IRCCS Ca' Granda Ospedale Maggiore Policlinico, Milan, Italy; Department of Pathophysiology and Transplantation, Università degli Studi di Milano, Italy.
3 Section of Dermatology, Department of Clinical Medicine and Surgery, University of Naples Federico II, Italy.