1. Department of Nursing, Faculty of Health Sciences Okayama University Okayama Japan
2. SOMPO Care Inc Tokyo Japan
3. Research Department Institute for Health Economics and Policy, Association for Health Economics Research and Social Insurance and Welfare Tokyo Japan
4. Department of Home Care Medicine, Graduate School of Medicine The University of Tokyo Tokyo Japan
5. Graduate School of Medicine University of Yamanashi Yamanashi Japan
6. Wakakoukai Health Care Corporation, Geriatric Health Services Facility Tatsumanosato Osaka Japan
7. Department of Medicine for Integrated Approach to Social Inclusion, Graduate School of Biomedical and Health Sciences Hiroshima University Hiroshima Japan