1. Otorhinolaryngology Unit, Division of Head and Neck Department, IRCCS San Raffaele Scientific Institute, 20132 Milan, Italy
2. School of Medicine, Vita-Salute San Raffaele University, 20132 Milan, Italy
3. Radiology Unit, Candiolo Cancer Institute, FPO-IRCCS, Candiolo, 10060 Turin, Italy
4. Otorhinolaryngology Unit, Head and Neck Surgery, Candiolo Cancer Institute, FPO-IRCCS, Candiolo, 10060 Turin, Italy