1. Faculty of Health Sciences, Hokkaido University, Sapporo, Japan
2. Department of Rehabilitation, Hokushin Orthopaedic Hospital, Sapporo, Japan
3. Department of Orthopaedic Surgery, Hokushin Orthopaedic Hospital, Sapporo, Japan
4. Faculty of Health Science, Hokkaido Chitose College of Rehabilitation, Chitose, Japan