[1] Univ Salerno, Dept Med Surg & Dent, Salerno, Italy
[2] Univ Hosp San Giovanni Dio & Ruggi DAragona, Otolaryngol Dept, Salerno, Italy
[3] Magna Graecia Univ Catanzaro, Dept Expt & Clin Med, Unit Audiol, Reg Ctr Cochlear Implants & ENT Dis, Catanzaro, Italy
[4] Polytech Univ Marche, Dept Clin & Mol Sci, ENT Unit, Ancona, Italy
[5] Univ Sapienza, Dept Sense Organs, Rome, Italy
[6] Univ Turin, Dept Surg Sci, Turin, Italy