1. Department of Orthopaedic Surgery, Osaka University Graduate School of Medicine, Suita, Japan;
2. Department of Musculoskeletal Regenerative Medicine, Osaka University Graduate School of Medicine, Suita, Japan;
3. Department of Rheumatology, National Hospital Organization Osaka Minami Medical Center, Kawachinagano, Japan;
4. Department of Orthopaedic Surgery, National Hospital Organization Osaka Minami Medical Center, Kawachinagano, Japan