1 Surgical Sciences Department, University of Turin, Turin, Italy.
2 Department of Medicine and Surgery, University of Salerno, Salerno, Italy.
3 Department of Sense Organs, Sapienza University Rome, Rome, Italy; Center for Hearing and Deafness, University at Buffalo, Buffalo, NY 14214, USA.
4 Ear, Nose, and Throat Unit, Department of Clinical and Molecular Sciences, Polytechnic University of Marche, Ancona, Italy.
5 Audiology Unit, Department of Clinical Sciences and Community, Fondazione IRCCS Ca' Granda Ospedale Maggiore Policlinico, Università degli Studi di Milano, Milan, Italy.