1. Department of Otorhinolaryngology Head & Neck Surgery University of Fukui Fukui Japan
2. Department of Otolaryngology Head & Neck Surgery Okayama University Graduate School of Medicine Okayama Japan
3. Department of Otorhinolaryngology Jikei University School of Medicine Tokyo Japan
4. Department of Otorhinolaryngology‐Head & Neck Surgery Hiroshima University Hiroshima Japan
5. Department of Otorhinolaryngology Japanese Red Cross Society Wakayama Medical Center Wakayama Japan
6. Department of Otorhinolaryngology Head & Neck Surgery Dokkyo Medical University Tochigi Japan
7. Department of Otolaryngology Sapporo Medical University Hokkaido Japan
8. Department of Otorhinolaryngology Juntendo University Tokyo Japan
9. Department of Otorhinolaryngology Yokohama City Medical Center Kanagawa Japan
10. Department of Otolaryngology Jichi Medical University Saitama Medical Center Saitama Japan
11. Department of Otolaryngology Head & Neck Surgery Osaka Medical College Osaka Japan
12. Department of Otorhinolaryngology Shimane University Shimane Japan
13. Department of Otorhinolaryngology Head & Neck Surgery Mie University Graduate School of Medicine Mie Japan
14. Department of Otolaryngology University of Tokyo Tokyo Japan
15. Department of Otorhinolaryngology Kanazawa Medical University Ishikawa Japan
16. Department of Otorhinolaryngology Toho UniversityTokyo Japan
17. Division of Molecular Epidemiology Jikei University School of Medicine Tokyo Japan
18. Laboratory for Respiratory Diseases Center for Genomic Medicine Institute of Physical and Chemical Research (RIKEN) Kanagawa Japan
19. Department of Medical Genetics University of Tsukuba Ibaraki Japan