1. Otorhinolaryngology Unit, San Giovanni Bosco Hospital, 10154 Turin, Italy
2. Oncology Department, University of Turin, 10124 Torino, Italy
3. Otorhinolaryngology Unit, Vittorio Veneto Hospital, AULSS2 Treviso, 31029 Vittorio Veneto, Italy
4. Brazilian National Cancer Institute, Rio de Janeiro 20230-130, RJ, Brazil
5. Radiology Service, Candiolo Cancer Institute FPO IRCCS, Candiolo, 10060 Turin, Italy
6. Department of Research, ASOMI College of Sciences, 2080 Marsa, Malta
7. Department of Radiation Oncology, IRCCS Regina Elena National Cancer Institute, 00144 Rome, Italy