1. Department of Orthopaedic Surgery, Osaka University Graduate School of Medicine, Osaka, Japan,
2. Department of Rheumatology, National Hospital Organization Osaka Minami Medical Center, Osaka, Japan,
3. Department of Orthopaedic Surgery, National Hospital Organization Osaka Minami Medical Center, Osaka, Japan, and
4. Graduate School of Health Care Sciences, Jikei Institute, Osaka, Japan