1 Department of Biomedical, Surgical, and Dental Sciences, Unit of Oral Pathology and Medicine, Fondazione IRCCS Cà Granda Ospedale Maggiore Policlinico, University of Milan, Milan, Italy.
2 Maxillo-Facial and Odontostomatology Unit, Fondazione IRCCS Cà Granda Ospedale Maggiore Policlinico, Milan, Italy.