1. Department of Physical Therapy; School of Health Science, Ibaraki Prefectural University; Ami-machi Ibaraki Japan
2. Department of Physical Therapy and Occupational Therapy; Graduate School of Health Sciences, Sapporo Medical University; Sapporo Hokkai-do Japan
3. Department of Anatomy; School of Medicine, Sapporo Medical University; Sapporo Hokkai-do Japan
4. Department of Physical Therapy; School of Health Science, Sapporo Medical University; Sapporo Hokkai-do Japan