1. Department of Physical Therapy, Ibaraki Prefectural University of Health Sciences Hospital, Japan
2. Center for Medical Sciences, Ibaraki Prefectural University of Health Sciences: 4669-2 Ami, Ami-machi, Inashiki-gun, Ibaraki 300-0394, Japan
3. Department of Orthopaedic Surgery, Ibaraki Prefectural University of Health Sciences Hospital, Japan
4. Department of Occupational Therapy, Mejiro University, Japan
5. Department of Rehabilitation Medicine, University of Tsukuba Hospital, Japan
6. Department of Rehabilitation, Ibaraki Prefectural University of Health Sciences Hospital, Japan