1. Division of Otorhinolaryngology “San Maurizio” Hospital Bolzano Italy
2. Division of Otolaryngology and Head and Neck Surgery European Institute of Oncology IRCCS Milan Italy
3. Department of Otorhinolaryngology University of Insubria Varese Italy
4. Department of Surgical Oncology, Oncology Center Mansoura University Mansoura Egypt
5. Department of Otorhinolaryngology and Head and Neck Surgery Fondazione IRCCS Ca' Granda, Ospedale Maggiore Policlinico Milano Italy