1. Department of Sports Medicine, Hokkaido University Graduate School of Medicine, Sapporo, Japan.
2. Department of Physical Therapy, Hokkaido Bunkyo University Graduate School of Rehabilitation Science, Eniwa, Japan.
3. Knee Research Center, Yagi Orthopaedic Hospital, Sapporo, Japan.
4. Department of Advanced Therapeutic Research for Sports Medicine, Hokkaido University Graduate School of Medicine, Sapporo, Japan.
5. Department of Clinical Anatomy, Tokyo Medical and Dental University, Tokyo, Japan.