1. Department of Geriatric Medicine; Graduate School of Medicine; The University of Tokyo; Tokyo Japan
2. Itabashikuyakusyomae Medical Office; Tokyo Japan
3. Benesse Senior Support Co.Ltd; Tokyo Japan
4. Message Co. Ltd; Tokyo Japan
5. The Japanese Association of Retirement Housing; Tokyo Japan
6. Seisinn Co. Ltd, Dazaifu; Fukuoka Japan