1 Nishinasuno General Home Care Center, Department of Day Rehabilitation, Care Facility for the Elderly "Maronie-en", Tochigi, Japan.
2 Nishinasuno General Home Care Center, Department of Day Rehabilitation, Care Facility for the Elderly "Maronie-en", Tochigi, Japan; Department of Physical Therapy, School of Health Sciences, International University of Health and Welfare, Tochigi, Japan.
3 Department of Physical Therapy, School of Health Sciences, International University of Health and Welfare, Tochigi, Japan.
4 Nishinasuno General Home Care Center, Department of Day Rehabilitation, Care Facility for the Elderly "Maronie-en", Tochigi, Japan; Department of Geriatric Medicine, School of Medicine, International University of Health and Welfare, Chiba, Japan. Electronic address: turanotky@gmail.com.