1 Department of Otorhinolaryngology, Maxillofacial and Thyroid Surgery, Fondazione IRCCS National Cancer Institute of Milan, University of Milan, Milan, Italy.
2 Department of Otorhinolaryngology, Head and Neck Surgery, Fondazione IRCCS, Cà Granda Ospedale Maggiore Policlinico, University of Milan, Milan, Italy.
3 Department of Otorhinolaryngology, Head and Neck Surgery, ASST Santi Paolo e Carlo, University of Milan, Milan, Italy.