1. Department of Rehabilitation Medicine, Keio University School of Medicine, Tokyo, Japan
2. Department of Rehabilitation Medicine, Keio University School of Medicine, 35 Shinanomachi, Shinjuku-ku, Tokyo 160-8582, Japan
3. Department of Rehabilitation Medicine, Keio University Hospital, Tokyo, Japan
4. Faculty of Rehabilitation, School of Health Sciences, Fujita Health University, Toyoake-shi, Aichi, Japan
5. Department of Physical Therapy, Yamagata Prefectural University of Health Sciences, Yamagata-shi, Yamagata, Japan