1. Department of Rehabilitation, Hokkaido University Hospital, Sapporo, Hokkaido, Japan
2. Department of Rehabilitation Science, Faculty of Health Sciences, Hokkaido University, Sapporo, Hokkaido, Japan
3. Department of Functional Reconstruction for the Knee Joint, Faculty of Medicine, Hokkaido University, Sapporo, Hokkaido, Japan
4. Department of Orthopaedic Surgery, Faculty of Medicine, Hokkaido University, Sapporo, Hokkaido, Japan
5. Centre for Sports Medicine, Hokkaido University Hospital, Sapporo, Hokkaido, Japan