F Spadari1, M Rossi1, P Salvatori2, R Pertile1, G P Bombeccari1. 1. Department of Biomedical, Surgical and Dental Sciences, Unit of Oral Pathology and Medicine, Ospedale Maggiore Policlinico Fondazione Ca' Granda IRCCS, University of Milan, Italy. 2. Unit of Otolaryngology, Medical Management UO ORL AO Legnano, Legnano Hospital, Milan, Italy.