1 Department of Medicine, Surgery and Dentistry, University of Salerno, Salerno, Italy.
2 Department of Otolaryngology, Ospedale Fatebenefratelli Isola Tiberina - Gemelli Isola, Rome, Italy.
3 Eye Unit, Department of Medicine Surgery, and Dentistry "Scuola Medica Salernitana", University of Salerno, Salerno, Italy.
4 Department of Experimental and Clinical Medicine, Unit of Audiology, Regional Centre for Cochlear Implants and ENT Diseases, Magna Graecia University, Catanzaro, Italy.
5 ENT, Azienda Ospedaliero Universitaria delle Marche, Ancona, Italy.
6 Klinik und Poliklinik für Hals-, Nasen- und Ohrenheilkunde, Medizinische Hochschule Hannover, Hannover, Germany.