1. Head and Neck Oncology Service, Oncology Department; University of Turin, Candiolo Cancer Institute - FPO; IRCCS Candiolo (To) Italy
2. Otolaryngology Service, Vittorio Veneto Hospital; Vittorio Veneto; Treviso Italy
3. Department of Otorhinolaryngology - Head and Neck Surgery; University of Brescia; Brescia Italy
4. Otolaryngology Service, Head and Neck Department, Policlinico Hospital; University of Modena; Italy
5. Radiology Service; Mauriziano Umberto I Hospital; Turin Italy
6. Department of Clinical and Biological Sciences; University of Turin; Italy
7. Department of Otorhinolaryngology - Head and Neck Surgery; University of Genoa; Genoa Italy