1. Department of Artificial Organs and Medical Device Creation, National Institute of Sensory Organs, Tokyo, Japan
2. Department of Otolaryngology, University of Tokyo Graduate School of Medicine, Tokyo, Japan
3. Department of General Internal Medicine, National Hospital Organization Tokyo Medical Center, Tokyo, Japan
4. Department of Otolaryngology, National Hospital Organization Nagasaki Medical Center, Tokyo, Japan
5. Department of Otolaryngology, National Hospital Organization Kobe Medical Center, Tokyo, Japan
6. Miura ENT Clinic, Tokyo, Japan
7. Department of Otolaryngology, Sagamihara National Hospital, Tokyo, Japan
8. Department of Otolaryngology, Hirosaki National Hospital, Tokyo, Japan
9. Department of Otolaryngology, National Mie Hospital, Tokyo, Japan
10. Department of Otolaryngology, National Sendai Medical Center, Tokyo, Japan
11. Department of Otolaryngology, National Hospital Organization Nagoya Medical Center, Tokyo, Japan
12. Department of Rehabilitation, National Hospital Organization Tokyo National Hospital, Tokyo, Japan
13. Department of Otolaryngology, National Hospital Organization Tokyo Medical Center, Tokyo, Japan
14. Department of Neurology National Hospital Organization Tokyo Medical Center, Tokyo, Japan