Affiliation: | 1. Otorhinolaryngology Unit, Head and Neck Department, San Paolo Hospital, University of Milan, Milan, Italy;2. Department of Epidemiology, Institutes for Research, Hospitalization and Health Care–Mario Negri Institute for Pharmacological Research, Milan, Italy;3. Department of Orthodontics and Paediatric Dentistry, Institutes for Research, Hospitalization and Health Care–IRCCS Foundation Ca' Granda, University of Milan, Milan, Italy |