1. Department of Otolaryngology Toyohashi Municipal Hospital Toyohashi Japan
2. Division of Cancer Epidemiology and Prevention Aichi Cancer Center Research Institute Nagoya Japan
3. Department of Head and Neck Surgery – Otolaryngology Asahi University Hospital Gifu Japan
4. Department of Pathology and Molecular Diagnostics Aichi Cancer Center Hospital Nagoya Japan
5. Department of Otolaryngology – Head and Neck Surgery Nadogaya Hospital Kashiwa Japan
6. Department of Oral and Maxillofacial Surgery Saitama Medical University Saitama Japan
7. Department of Otolaryngology – Head and Neck Surgery National Defense Medical Collage Tokorozawa Japan
8. Department of Otorhinolaryngology, Head and Neck Surgery Kamifukuoka General Hospital Saitama Japan
9. Department of Otolaryngology – Head and Neck Surgery, School of Medicine Fujita Health University Toyoake Japan
10. Department of Otorhinolaryngology, Head and Neck Surgery, Graduate School of Medicine University of the Ryukyus Okinawa Japan
11. Department of Otorhinolaryngology / Head and Neck Surgery Kushiro City General Hospital Kushiro Japan
12. Department of Otorhinolaryngology Okazaki City Hospital Okazaki Japan
13. Department of Head and Neck Surgery Aichi Cancer Center Hospital Nagoya Japan
14. Department of Otolaryngology, Head and Neck Surgery Nagoya City University Graduate School of Medical Sciences Nagoya Japan
15. Department of Otorhinolaryngology Nagoya University Graduate School of Medicine Nagoya Japan
16. Department of Otorhinolaryngology Konan Kosei Hospital Konan Japan