1. Department of Rheumatology and Applied Immunology, Saitama Medical University, Saitama, Japan;
2. Center for Intractable Diseases, Saitama Medical University, Saitama, Japan;
3. Department of Internal Medicine, Faculty of Medicine, University of Tsukuba, Ibaraki, Japan;
4. Faculty of Medicine, Saga University, Saga, Japan;
5. Department of Internal Medicine, Division of Rheumatology/Clinical Immunology, Jichi Medical University, Tochigi, Japan;
6. Department of Social Medicine, Faculty of Medicine, Division of Public Health, Saitama Medical University, Saitama, Japan;
7. Department of Pediatrics, Osaka Medical College, Osaka, Japan;
8. Institute of Rheumatology, Tokyo Women's Medical University, Tokyo, Japan;
9. Department of Internal Medicine, Teikyo University School of Medicine, Tokyo, Japan;
10. Department of Rheumatology, Juntendo University Koshigaya Hospital, Saitama, Japan;
11. Faculty of Medicine, School of Health Sciences, Kagoshima University, Kagoshima, Japan;
12. Department of Molecular Regulation for Intractable Diseases, Institute of Medical Science, Tokyo Medical University, Tokyo, Japan;
13. Department of Dermatology, Faculty of Medicine, University of Tsukuba, Ibaraki, Japan;
14. Department of Rheumatology, Iwate Prefectural Central Hospital, Iwate, Japan