| Affiliation: | 1. Department of Speech and Hearing Sciences at Ookawa, International University of Health and Welfare, Ookawa Fukuoka, Japan;2. Department of Speech and Hearing Sciences at Narita, International University of Health and Welfare, Narita, Japan;3. The Voice and Dizziness Clinic, Futakotamagawa Otolaryngology, Setagaya, Japan;4. Tokyo Voice Center, Sanno Hospital, International University of Health and Welfare, Minato-ku, Japan;5. Mita Hospital, International University of Health and Welfare, Minato-ku, Japan |
