1. Department of Physical Therapy, Ibaraki Prefectural University of Health Sciences: 4669-2 Ami, Amimachi, Inashiki-gun, Ibaraki 300-0394, Japan
2. Department of Physical Therapy, Faculty of Human Science, Hokkaido Bunkyo University, Japan
3. Department of Physical Therapy, Ibaraki Prefectural University of Health Sciences Hospital, Japan
4. Senri Rehabilitation Hospital, Japan