1. Department of Pathophysiology and Transplantation; Università degli Studi di Milano; Istituto di Ricovero e Cura a Carattere Scientifico (IRCCS) (Italian Research Hospital Foundation); Ospedale Maggiore Policlinico; Milan Italy
2. Ear, Nose and Throat Department; San Giuseppe Hospital; Milan Italy
3. Department of Dermatology; Basildon and Thurrock University Hospital National Health Service Foundation Trust; Basildon UK