1. Department of Physical Therapy, Ibaraki Prefectural University of Health Sciences Hospital, Ami Ibaraki, Japan
2. Department of Physical Therapy, Ibaraki Prefectural University of Health Sciences, Ami Ibaraki, Japan
3. Faculty of Systems and Information Engineering, University of Tsukuba, Tsukuba Ibaraki, Japan
4. Department of Neurology, Ibaraki Prefectural University of Health Sciences Hospital, Ami Ibaraki, Japan
5. Faculty of Medicine, University of Tsukuba, Tsukuba Ibaraki, Japan
6. Department of Clinical Trial and Clinical Epidemiology, Faculty of Medicine, University of Tsukuba, Tsukuba Ibaraki, Japan