| Affiliation: | 1. Division of Head and Neck, Cancer Institute Hospital, Tokyo, Japan;2. Department of Head and Neck Surgery, Aichi Cancer Center, Aichi, Japan;3. Department of Head and Neck Oncology, Saitama Medical University International Medical Center, Saitama, Japan;4. Department of Surgery, Osaka Police Hospital, Osaka, Japan;5. Department of Surgery, Kuma Hospital, Hyogo, Japan;6. Head and Neck Surgery Division, National Cancer Center Hospital East, Chiba, Japan;7. Department of Otorhinolaryngology‐Head and Neck Surgery, Nara Medical University, Nara, Japan;8. Department of Otolaryngology, Okayama Saiseikai General Hospital, Okayama, Japan;9. Division of Otolaryngology, Head and Neck Surgery, Tottori University, Tottori, Japan |
