1. Department of Rheumatology, Yukioka Hospital, Osaka, Japan;
2. Department of Orthopaedic Surgery, Osaka University Graduate School of Medicine, Osaka, Japan;
3. Department of Orthopaedic Surgery, Hamawaki Orthopaedic Hospital, Hiroshima, Japan;
4. Department of Health and Sport Sciences, Osaka University Graduate School of Medicine, Osaka, Japan;
5. Osaka Police Hospital, Osaka, Japan