1. Unit of Oral Pathology and Medicine; Department of Biomedical, Surgical and Dental Sciences; University of Milan; Ospedale Maggiore Policlinico IRCCS Ca'Granda Foundation; Milan Italy
2. Unit of Oral Pathology; Department of Surgical and Morphological Sciences; University of Insubria; Ospedale di Circolo Macchi Foundation; Varese Italy
3. Department of Clinical and Experimental Medicine; Research center in Epidemiology and Preventive Medicine (EPIMED); University of Insubria; Varese Italy