1. Department of Orthopedics Surgery and Rheumatology, Clinical Research Institute, National Hospital Organization Kyushu Medical Center , Fukuoka, Japan
2. Department of Orthopedics Surgery, Oita Red Cross Hospital , Oita, Japan
3. Department of Rheumatology and Orthopedics Surgery, Kondo Clinic of Rheumatology and Orthopaedic Surgery , Fukuoka, Japan
4. Department of Orthopaedic Surgery, Graduate School of Medical Science, Kyushu University , Fukuoka, Japan