1. Department of Otorhinolaryngology; Aichi Medical University; Nagakute Aichi Japan
2. Department of Otorhinolaryngology; National Center for Geriatrics and Gerontology; Aichi Japan
3. Department of Otorhinolaryngology; Nagoya University Graduate School of Medicine; Nagoya Japan
4. Department of Health and Medical Sciences; Aichi Shukutoku University; Aichi Japan
5. Department of Head and Neck Surgery; Aichi Cancer Center; Nagoya Japan
6. Department of Otorhinolaryngology; Tosei General Hospital; Seto Aichi Japan
7. Department for Development of Preventive Medicine; Center for Development of Advanced Medicine for Dementia, National Center for Geriatrics and Gerontology; Aichi Japan