1. Unit of Dermatology Fondazione IRCCS Ca' Granda Ospedale Maggiore Policlinico Milan Italy
2. Department of Pathophysiology and Transplantation University of Milan Milan Italy
3. Dermatology Unit ASST Santi Paolo e Carlo Milan Italy
4. Division of Pathology Fondazione IRCCS Ca' Granda Ospedale Maggiore Policlinico Milan Italy