1. Department of Rehabilitation, Shonan University of Medical Sciences: 16-48 Kamishinano-cho, Totsuka-ku, Yokohama-shi, Kanagawa 244-0806, Japan
2. Graduate Course of Health and Social Services, Kanagawa University of Human Services, Japan
3. Department of Rehabilitation, Saiseikai Yokohamashi Tobu Hospital, Japan
4. Division of Physical Therapy, Faculty of Health and Social Work, Kanagawa University of Human Services, Japan
5. Department of Mechanical Systems Engineering, Tokai University, Japan