1 Department of Otolaryngology and Head and Neck Surgery, Fondazione IRCCS Ca' Granda Ospedale Maggiore Policlinico, Milan, Italy. sara.torretta@unimi.it.
2 Department of Clinical Sciences and Community Health, University of Milan, Milan, Italy. sara.torretta@unimi.it.
3 Department of Otolaryngology and Head and Neck Surgery, Fondazione IRCCS Ca' Granda Ospedale Maggiore Policlinico, Milan, Italy.
4 Department of Biomedical Surgical Dental Science, University of Milan, Milan, Italy.
5 Pediatric Highly Intensive Care Unit, Fondazione IRCCS Ca' Granda Ospedale Maggiore Policlinico, Milan, Italy.
6 Department of Pathophysiology and Transplantation, University of Milan, Milan, Italy.
7 Department of Clinical Sciences and Community Health, University of Milan, Milan, Italy.