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