1 Dermatology Unit, Fondazione IRCCS Ca' Granda Ospedale Maggiore Policlinico/Department of Pathophysiology and Transplantation, Università degli Studi di Milano, Trieste, Italy.
2 Department of Pathophysiology and Transplantation, Università degli Studi di Milano, Milan/Department of Medical Surgical and Health Sciences, University of Trieste, Trieste, Italy.
3 Dermatology Unit, Fondazione IRCCS Ca' Granda Ospedale Maggiore Policlinico, Milan, Italy.
4 Pathology Unit, Fondazione IRCCS Ca' Granda Ospedale Maggiore Policlinico, Milan, Italy.