1. Kariya Hearing Clinic
2. Department of Otorhinolaryngology, National Center for Geriatrics and Gerontology
3. Department of Otorhinolaryngology, Aichi Medical University
4. Department of Otorhinolaryngology, Nagoya Medical Center
5. Department of Otorhinolaryngology, Nagoya University School of Medicine
6. Ichinomiya Medical Treatment and Habilitation Center