1. Department of Biomedical Surgical and Dental Sciences, University of Milan, 20122 Milan, Italy
2. Maxillo-Facial and Odontostomatology Unit, Foundation IRCCS Ca’ Granda Ospedale Maggiore Policlinico, 20122 Milan, Italy
3. Section of Dentistry, Department of Clinical, Surgical, Diagnostic and Pediatric Sciences, University of Pavia, 27100 Pavia, Italy