1. Department of Head and Neck, Unit of Otorhinolaryngology, University of Verona, Verona, Italy
2. Dipartimento strutturale Chirurgie Specialistiche, Otolaryngology Unit, Vicenza Hospital, Vicenza, Italy
3. Dipartimento strutturale Chirurgie Specialistiche, IRCCS Foundation Ca’ Granda Ospedale Maggiore, Audiology Unit, Milan, Italy
4. Primary Care Department, AUSL, Modena, Italy