1. Department of Medicine & Surgery, Section of Otorhinolaryngology, University of Perugia, 06126 Perugia, Italy
2. Audiology and Otorhinolaryngology Unit, Institute for Maternal and Child Health IRCCS “Burlo Garofolo”, 34137 Trieste, Italy
3. Clinical Oncology, Santa Maria della Misericordia Hospital, University of Perugia, 06126 Perugia, Italy