1. Department of Otolaryngology, National Center for Child Health and Development
2. Department of Pediatric Rehabilitation, Hiroshima prefectural hospital
3. Aso ENT Clinic
4. Department of Otolaryngology and Head and Neck Surgery, The University of Tokyo
5. Kanda E・N・T Clinic
6. Department of Otolaryngology Akita Prefectural Medical Center of Rihabiritation and Psychiatry
7. Department of Otolaryngology, Teikyo University School of Medicine
8. Department of Otorhinolaryngology and Head & Neck Surgery, Graduate School of Medical Sciences, Kyushu University
9. Department of Otolaryngology-Head and Neck Surgery, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences