1. Division of Immunology and Rheumatology, Department of Internal Medicine 3, Hamamatsu University School of Medicine, Hamamatsu-City, Japan;
2. Department of Rheumatology, Omaezaki Municipal Hospital, Omaezaki-City, Japan;
3. Yasuhiro Clinic, Hamamatsu-City, Japan;
4. Kobori Orthopedic Clinic, Hamamatsu-City, Japan;
5. Department of Orthopedic Surgery, Hamamatsu University School of Medicine, Hamamatsu, Japan;
6. Department of Rheumatology, Shizuoka Kosei Hospital, Shizuoka-City, Japan;
7. Hayakawa Clinic, Hamamatsu, Japan;
8. Goto Clinic, Hamamatsu, Japan;
9. Department of Rheumatology, Fujieda Municipal Hospital, Fujieda, Japan;
10. Kimoto Clinic, Hamamatsu, Japan;
11. Department of Rheumatology, Seirei Hamamatsu General Hospital, Hamamatsu, Japan