1. Department of Day Rehabilitation, Care Facility for the Elderly “Maronie-en”, Nishinasuno General Home Care Center, Nasushiobara, Tochigi, Japan
2. Department of Physical Therapy, School of Health Sciences, International University of Health and Welfare, Otawara, Tochigi, Japan
3. Department of Geriatric Medicine, School of Medicine, International University of Health and Welfare, Narita, Chiba, Japan