1. Department of Hygiene and Public Health, Faculty of Medicine, Institute of Medical, Pharmaceutical and Health Sciences, Kanazawa University , Ishikawa, Japan
2. Department of Nephrology, Rheumatology, Endocrinology and Metabolism, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences , Okayama, Japan
3. Department of Nephrology and Laboratory Medicine, Faculty of Medicine, Institute of Medical, Pharmaceutical and Health Sciences, Kanazawa University , Ishikawa, Japan
4. Department of Rheumatology and Clinical Immunology, Saitama Medical Center, Saitama Medical University , Kawagoe, Japan
5. Division of Hematology, Rheumatology and Respiratory Medicine, Department of Internal Medicine, Faculty of Medicine, Kagawa University , Kagawa, Japan
6. Department of Rheumatology, Endocrinology and Nephrology, Faculty of Medicine and, Graduate School of Medicine, Hokkaido University , Sapporo, Japan
7. Department of Medicine and Rheumatology, Tokyo Metropolitan Geriatric Hospital , Tokyo, Japan
8. Department of Nephrology, Tokyo Medical University Ibaraki Medical Center , Ami, Japan
9. Department of Nephrology and Rheumatology, Aichi Medical University , Nagakute, Japan
10. Department of Rheumatology, Shimane University Faculty of Medicine , Izumo, Japan
11. Department of Nephrology, Fujita Health University School of Medicine , Toyoake, Japan
12. Department of Nephrology, Faculty of Medicine, University of Tsukuba , Ibaraki, Japan
13. Department of Nephrology and Rheumatology, Kyorin University School of Medicine , Tokyo, Japan
14. Kichijoji Asahi Hospital , Tokyo, Japan
15. Okayama University , Okayama, Japan
16. Division of Rheumatology, Department of Internal Medicine, Tokyo Women’s Medical University School of Medicine , Tokyo, Japan