1. Department of Physical Therapy, School of Health Sciences; Japan University of Health Sciences; Saitama Japan
2. Department of Preventive Gerontology; Center for Gerontology and Social Science National Center for Geriatrics and Gerontology Obu; Aichi Japan
3. Department of Physical Therapy, School of Health Sciences at Odawara; International University of Health and Welfare; Kanagawa Japan
4. Department of Physical Therapy, School of Health Sciences at Narita; International University of Health and Welfare; Chiba Japan