1. Graduate School of Health Sciences; Gunma University; Maebashi Japan
2. Department of Rehabilitation; Gunma University of Health and Welfare; Maebashi Japan
3. School of Health Care; Takasaki University of Health and Welfare; Takasaki Japan
4. Department of Rehabilitation Medicine; University of Occupational and Environmental Health; Fukuoka Japan
5. Tokyo Metropolitan Institute of Gerontology; Tokyo Japan