1. Division of Otolaryngology, Tohoku Medical and Pharmaceutical University
2. Yuta Clinic
3. Suzuki ENT and allergy clinic
4. Dainohara ENT clinic
5. Hirose ENT clinic
6. Kusakari ENT clinic
7. Takeda ENT and allergy clinic
8. Kanbayashi ENT clinic
9. Seseragi ENT clinic
10. Otake ENT clinic
11. Department of Otolaryngology Head and Neck Surgery, Yamagata Univiersity Faculty of Medicine
12. Kamo ENT clinic
13. Nakabayashi ENT clinic
14. Natori ENT and allergy clinic
15. Department of Otolaryngology, Shonan Kamkura Hospital
16. Department of Otolaryngology, Toho University
17. Department of Otolaryngology-Head and Neck Surgery, Tohoku University Graduate School of Medicine
18. Department of Otolaryngology, Head and Neck Surgery, Chiba Graduate School University