1. Department of Orthopaedic Surgery, Osaka University Graduate School of Medicine, Osaka, Japan
2. Department of Orthopaedic Surgery, Osaka Rosai Hospital, Osaka, Japan
3. Department of Orthopaedic Surgery/Rheumatology, National Hospital Organization, Osaka Minami Medical Center, Osaka, Japan
4. Department of Orthopaedic Surgery, Japan Community Health Care Organization (JCHO), Hoshigaoka Medical Center, Osaka, Japan
5. Department of Orthopaedic Surgery, Japan Community Health Care Organization (JCHO), Osaka Hospital, Osaka, Japan
6. Department of Orthopaedic Surgery, National Hospital Organization, Osaka-Toneyama Medical Center, Osaka, Japan