1. Department of Geriatric and General MedicineOsaka University Graduate School of Medicine Osaka Japan
2. Division of Health ScienceKobe University, Graduate School of Medicine Hyogo Japan
3. Division of Health ScienceOsaka University, Graduate School of Medicine Osaka Japan
4. Tokyo Metropolitan Institute of Gerontology, Research Team for Promoting Independence and Mental Health Tokyo Japan
5. Department of Clinical Thanatology and Geriatric Behavioral ScienceOsaka University, Graduate School of Human Science Osaka Japan
6. Tokyo Metropolitan Institute of Gerontology Research Team for Human Care Tokyo Japan
7. Keio University, School of Medicine Tokyo Japan
8. Department of ProsthodonticsGerontology and Oral Rehabilitation, Osaka University Graduate school of Dentistry Osaka Japan