1. Department of Joint Surgery and Sports Medicine, Graduate School, Tokyo Medical and Dental University, Tokyo, Japan
2. Department of Orthopaedic Surgery, Tokyo Medical and Dental University Hospital, Tokyo, Japan
3. Department of Orthopaedic Surgery, Dokkyo Medical University Saitama Medical Center, Koshigaya, Saitama, Japan
4. Department of Orthopaedic Surgery, Kawaguchi Kogyo General Hospital, Kawaguchi, Saitama, Japan
5. Department of Orthopaedic Surgery, Doai Memorial Hospital, Tokyo, Japan