1. Department of Otorhinolaryngology, Japanese Red Cross Aichi Medical Center Nagoya Daini Hospital
2. Department of Otorhinolaryngology, Head and Neck Surgery, Nagoya City University Graduated School of Medical Sciences
3. Department of Otorhinolaryngology, Nagoya City University West Medical Center
4. Department of Otorhinolaryngology, Konan Kosei Hospital
5. Department of Head and Neck Medical Oncology, National Cancer Center Hospital East
6. Department of Head and Neck Oncology, The Cancer Institute Hospital of the Japanese Foundation for Cancer Research
7. Department of Otorhinolaryngology, Kainan Hospital
8. Department of Otorhinolaryngology, Anjo Kosei Hospital
9. Department of Radiation Oncology, Nagoya Proton Therapy Center, Nagoya City University West Medical Center