1. Department of Physical Therapy, Graduate School of International University of Health and Welfare: 2600-1 Kitakanemaru, Ohtawara, Tochigi 323-8501, Japan
2. Department of Rehabilitation, International University of Health and Welfare Hospital, Japan
3. Innovative-Rehabilitation Center, New Spine Clinic Tokyo, Japan
4. Department of Rehabilitation, International University of Health and Welfare Narita Hospital, Japan
5. Department of Rehabilitation, Yamagata Saisei Hospital, Japan