1. Department of Preventive Dentistry and Dental Public Health School of Dentistry, Aichi Gakuin University Aichi Japan
2. Comprehensive Health Science Center Aichi Health Promotion Public Interest Foundation Aichi Japan
3. National Center for Geriatrics and Gerontology Aichi Japan
4. Department of Oral Disease Research, National Center for Geriatrics and Gerontology Aichi Japan
5. Aichi Dental Association Aichi Japan