1. Department of Orthopaedic Surgery, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama, Japan
2. Department of Orthopaedic Surgery, Okayama University Hospital, Okayama, Japan
3. Department of Sports Medicine, Faculty of Medicine, Dentistry and Pharmaceutical Sciences, Okayama University, Okayama, Japan
4. Department of Rehabilitation Medicine, Okayama University Hospital, Okayama, Japan