1. Maxillofacial Surgery and Odontostomatology Unit IRCCS Fondazione Ca' Granda, Ospedale Maggiore Policlinico di Milano Milan Italy
2. Department of Biomedical, Surgical and Dental Sciences University of Milano Milan Italy
3. Division of Pathology IRCCS Fondazione Ca' Granda, Ospedale Maggiore Policlinico di Milano Milan Italy
4. UOSD Clinical Trial Center, Biostatistics and Bioinformatics IRCCS Regina Elena National Cancer Institute Rome Italy