1. Otorhinolaryngology ServiceVittorio Veneto Hospital Treviso Italy
2. Humanitas San Pio X Hospital Milan Italy
3. Department of Otolaryngology–Head and Neck SurgeryUniversity of Modena and Reggio Emilia, Policlinico di Modena Modena Italy
4. Head Neck Oncology Unit Candiolo Cancer Institute–FPO IRCCS Candiolo Italy
5. Department of OncologyUniversity of Turin Orbassano Italy