1. Ear Nose and Throat Unit, Azienda Ospedaliera di Rilievo Nazionale Antonio Cardarelli, vi Antonio Caradelli, Napoli, Italy
2. Department of Experimental and Clinical Medicine, Unit of Audiology, Regional Centre of Cochlear Implants and ENT Diseases, Magna Graecia University, Catanzaro, Italy
3. Department of Otolaryngology and Head and Neck Surgery, IRCCS “Regina Elena” National Cancer Institute, Rome, Italy