1. Graduate School of Health Science, Ibaraki Prefectural University of Health Sciences: 4669-2 Ami, Ibaraki 300-0394, Japan
2. Ibaraki Prefectural Central Hospital, Japan
3. Department of Physical Therapy, Ibaraki Prefectural University of Health Sciences, Japan
4. Center for Medical Sciences, Ibaraki Prefectural University of Health Sciences, Japan
5. Master Course of Science in Physical Therapy, Takasaki University of Health and Welfare Graduate School of Health Care, Japan