[1] Magna Graecia Univ Catanzaro, Reg Ctr Cochlear Implants & ENT Dis, Dept Expt & Clin Med, Unit Audiol, I-88100 Catanzaro, Italy
[2] S Giuseppe Hosp, Unit Otolaryngol, Empoli, Firenze, Italy
[3] Univ Salerno, Dept Med & Surg, I-84084 Fisciano, Italy
[4] AORN Cardarelli, ENT Dept, I-80131 Naples, Italy
[5] Pisa Univ Hosp, Dept Med & Surg, Pisa, Italy