1. Department of Orthopaedic Surgery, St. Marianna University School of Medicine
2. Department of Orthopedic Surgery, Seirei Sakura Citizen Hospital
3. Department of Orthopedic Surgery, Graduate School of Medicine, Chiba University
4. Department of Orthopaedic Surgery, Kitasato University School of Medicine
5. Department of Orthopaedic Surgery, Eastern Chiba Medical Center