Affiliation: | 1. Department of Otolaryngology – Head and Neck Surgery, Hokkaido University Graduate School of Medicine, Sapporo, Hokkaido, Japan 2. Head and Neck Surgery, National Cancer Center Hospital East, Kashiwa, Japan 3. Head and Neck Surgery, Miyagi Cancer Center, Sendai, Japan 4. Otolaryngology-Head and Neck Surgery, Tohoku University School of Medicine, Sendai, Japan 5. Head and Neck Oncology, Japanese Foundation for Cancer Research, Cancer Institute Hospital, Tokyo, Japan 6. Otorhinolaryngology-Head and Neck Surgery, National Shikoku Cancer Center, Matsuyama, Matsuyama, Japan 7. Head and Neck Surgery, Aichi Cancer Center, Nagoya, Japan 8. Head and Neck Surgery, Shizuoka Cancer Center, Shizuoka, Japan 9. Otolaryngology, Nagoya University Graduate School of Medicine, Nagoya, Japan 10. Head and Neck Surgery, Hyogo Cancer Center, Akashi, Japan 11. Otolaryngology, Tokai University School of Medicine, Isehara, Japan 12. Otolaryngology, Fukushima Medical University School of Medicine, Fukushima, Japan 13. Otolaryngology-Head and Neck Surgery, Osaka Medical Center for Cancer and Cardiovascular Diseases, Osaka, Japan 14. Otolaryngology-Head and Neck Surgery, Kobe University Graduate School of Medicine, Kobe, Japan 15. Otorhinolaryngology, Jikei University School of Medicine, Tokyo, Japan 16. Otolaryngology-Head and Neck Surgery, Jichi Medical University School of Medicine, Shimotsuke, Tochigi, Japan 17. Otolaryngology-Head and Neck Surgery, Tokyo University School of Medicine, Tokyo, Japan 18. Otolaryngology-Head and Neck Surgery, Nara Medical University, Nara, Japan 19. Otolaryngology-Head and Neck Surgery, Kyoto University Graduate School of Medicine, Kyoto, Japan 20. Head and Neck Surgery, Kanagawa Cancer Center, Yokohama, Japan 21. Otolaryngology, Hiroshima University School of Medicine, Hiroshima, Japan 22. Otolaryngology-Head and Neck Surgery, Kyoto Prefectural University of Medicine, Kyoto, Japan 23. Otolaryngology, Keiyukai Sapporo Hospital, Sapporo, Japan 24. Otorhinolaryngology, National Tokyo Medical Center, Tokyo, Japan
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