1. Department of Rehabilitation, Faculty of Health Science, Hokkaido Chitose College of Rehabilitation, Hokkaido 066-0055, Japan
2. Department of Rehabilitation, Sinsapporo Neurosurgical Hospital, Sapporo, Hokkaido 004-0031, Japan
3. Department of Rehabilitation, Hokusei Hospital, Hokkaido 066-0081, Japan
4. Cho Orthopedic Clinic, Kawaguchi, Saitama 332-0015, Japan
5. Department of Rehabilitation, Oowada Hospital, Saitama 337-0053, Japan