1. Department of Otorhinolaryngology, Head and Neck Surgery, Nagoya City University Graduate School of Medical Sciences
2. Department of Otorhinolaryngology, Nagoya City University West Medical Center
3. Department of Otorhinolaryngology, Anjo Kosei Hospital
4. Department of Head and Neck Oncology, The Cancer Institute Hospital of the Japanese Foundation for Cancer Research
5. Department of Otorhinolaryngology, Kainan Hospital
6. Department of Head and Neck Surgery, Aichi Cancer Center Hospital
7. Department of Gastroenterological Surgery, Nagoya City University Graduate School of Medical Sciences