1. Department of Physical Therapy, Ibaraki Prefectural University of Health Sciences Hospital, Ibaraki, Japan
2. Center for Medical Sciences, Ibaraki Prefectural University of Health Sciences, Ibaraki, Japan
3. Department of Orthopedic Surgery, Ibaraki Prefectural University of Health Sciences Hospital, Ibaraki, Japan
4. Center for Humanities and Sciences, Ibaraki Prefectural University of Health Sciences, Ibaraki, Japan
5. Department of Neurology, Ibaraki Prefectural University of Health Sciences Hospital, Ibaraki, Japan