1. Department of Orthopaedic Surgery, Kyushu University, Fukuoka, Japan;
2. Department of Rheumatology and Orthopaedic Surgery, Kondo Clinic of Rheumatology and Orthopaedic Surgery, Fukuoka, Japan;
3. Department of Rheumatology and Orthopaedic Surgery, Shono Rheumatology Clinic, Fukuoka, Japan;
4. Department of Orthopaedic Surgery, Ishinishi Orthopedic Clinic, Fukuoka, Japan;
5. Department of Rheumatology, Shinkokura Hospital, Fukuoka, Japan;
6. Department of Orthopaedic Surgery, Kuroda Orthopedic Hospital, Fukuoka, Japan;
7. Department of Orthopedic Surgery, Fukuoka University, Fukuoka, Japan;
8. Department of Orthopaedic Surgery, Yagi Hospital, Fukuoka, Japan;
9. Department of Rheumatology and Orthopaedic Surgery, Maekawa Clinic of Rheumatology and Orthopaedic Surgery, Fukuoka, Japan;
10. Department of Rheumatology, Fukuoka Hoeikai Hospital, Fukuoka, Japan;
11. Centre of Artificial Joint and Rheumatism, Fukuoka Tokushukai Medical Center, Fukuoka, Japan;
12. Department of Orthopedic Surgery, Fukuoka University Chikushi Hospital, Fukuoka, Japan;
13. Department of Rheumatology, Hamanomachi Hospital, Fukuoka, Japan;
14. Department of Rheumatology, PS Clinic, Fukuoka, Japan;
15. Department of Rheumatology, Munakata Medical Association Hospital, Fukuoka, Japan;
16. Department of Orthopedics, National Hospital Organization Kyushu Medical Center, Fukuoka, Japan;
17. Department of Internal Medicine and Rheumatology, National Hospital Organization Kyushu Medical Center, Fukuoka, Japan;
18. Department of Orthopaedic Surgery, Wada Orthopaedic Clinic, Fukuoka, Japan;
19. Department of Rheumatology, National Fukuoka Hospital, Fukuoka, Japan;
20. Department of Rheumatology, Fukuoka Red Cross Hospital, Fukuoka, Japan;
21. Department of Rheumatology, Koga Hospital 21, Fukuoka, Japan