1 Department of Clinical Sciences and Community Health, University of Milan, Milan, Italy; Otolaryngology Department, Fondazione IRCCS Ca' Granda Ospedale Maggiore Policlinico, Milan, Italy. Electronic address: giovanna.cantarella@policlinico.mi.it.
2 Department of Clinical Sciences and Community Health, University of Milan, Milan, Italy; Department of Specialist Surgical Sciences, Audiology Unit, Fondazione IRCCS Ca' Granda Ospedale Maggiore Policlinico, Milan, Italy. Electronic address: mirko.alde@unimi.it.
3 Plastic surgery private practice, Milan, Italy. Electronic address: r.mazzola@outlook.com.