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