1 Department of Otorhinolaryngology/Head and Neck Surgery, Hamamatsu University School of Medicine, Hamamatsu, Japan.
2 Department of Otolaryngology-Head and Neck Surgery, Graduate School of Medicine, Kyoto University, Kyoto, Japan.
3 Department of Otorhinolaryngology, Tokyo Medical and Dental University, Tokyo, Japan.
4 Department of Otorhinolaryngology, Seoul National University Bundang Hospital, Seongnam-si, South Korea.
5 Auditory Development and Restoration Program, NIDCD Otolaryngology Surgeon-Scientist Program, Division of Intramural Research, National Institute on Deafness and Other Communication Disorders, National Institutes of Health, Bethesda, MD, United States.