1. Department of Orthopaedic Surgery, Kochi Medical School Hospital
2. Department of Orthopaedic Surgery, Nagasaki Rosai Hospital
3. Department of Orthopaedic Surgery, Wakayama Medical University Hospital
4. Department of Orthopaedic Surgery, Toyama University Hospital
5. Orthopedic Department, Kanto Rosai Hospital
6. Department of Orthopaedic Surgery, Shimonoseki City Hospital
7. Department of Orthopaedic Surgery, Keio University School of Medicine
8. Department of Orthopaedic Surgery, Chubu Rosai Hospital
9. Department of Orthopaedic Surgery, Teikyo University Chiba Medical Center