1. Department of Head and Neck Surgery Iwate Medical University School of Medicine Yahaba Japan
2. Department of Otolaryngology‐Head and Neck Surgery Kobe University Graduate School of Medicine Kobe Japan
3. Department of Otorhinolaryngology Nagoya University Graduate School of Medicine Nagoya Japan
4. Department of Head and Neck Surgery Tokyo Medical and Dental University Bunkyo‐ku Japan
5. Department of Otolaryngology‐Head and Neck Surgery, Faculty of Medicine and Graduate School of Medicine Hokkaido University Sapporo Japan
6. Department of Head and Neck Surgery Cancer Institute Hospital of JFCR Tokyo Japan
7. Department of Otolaryngology‐Head and Neck Surgery Tohoku University Hospital Sendai Japan
8. Department of Otolaryngology Tokai University School of Medicine Hiratsuka Japan
9. Department of Otolaryngology Fukushima Medical University Fukushima Japan
10. Department of Otolaryngology‐Head and Neck Surgery Kyoto Prefectural University of Medicine Kyoto Japan
11. Department of Otorhinolaryngology‐Head and Neck Surgery, Graduate School of Biomedical and Health Sciences Hiroshima University Higashihiroshima Japan
12. Department of Head and Neck Surgery Aichi Cancer Center Hospital Nagoya Japan
13. Department of Otorhinolaryngology Head and Neck Surgery, Tokyo Medical University Shinjuku‐ku Japan
14. Department of Otolaryngology‐Head and Neck Surgery Nara Medical University Kashihara Japan
15. Department of Head and Neck Surgery National Cancer Center Hospital Tokyo Japan
16. Department of Head and Neck Surgery National Cancer Center Hospital East Kashiwa Japan
17. Department of Head and Neck Surgery Hyogo Cancer Center Akashi Japan
18. Department of Medical Oncology/Hematology Kobe University Hospital Cancer Center Kobe Japan
19. Department of Head and Neck Medical Oncology National Cancer Center Hospital East Kashiwa Japan
20. Division of Medical Engineering, Department of Information Science Iwate Medical University Yahaba Japan