1 Dermatology Unit, Fondazione IRCCS Ca' Granda Ospedale Maggiore Policlinico, Milan, Italy; Department of Pathophysiology and Transplantation, Università degli Studi di Milano, Milan, Italy.
2 Department of Biomedical Sciences, Humanitas University, Pieve Emanuele, Italy; Dermatology Unit, IRCCS Humanitas Research Hospital, Rozzano, Italy.
3 Department of Dermatology, CHUV University Hospital and University of Lausanne (UNIL), Lausanne, Switzerland.
4 Dermatology Unit, Fondazione IRCCS Ca' Granda Ospedale Maggiore Policlinico, Milan, Italy; Department of Pathophysiology and Transplantation, Università degli Studi di Milano, Milan, Italy. Electronic address: angelo.marzano@unimi.it.