1. Department of Nephrology, Rheumatology, Endocrinology and Metabolism, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama, Japan
2. Department of Rheumatology, School of Medicine, Tokyo Women's Medical University, Tokyo, Japan
3. Department of Rheumatology and Clinical Immunology, Saitama Medical Center, Saitama Medical University, Kawagoe, Japan
4. Department of Hemovascular Medicine and Artificial Organs, Faculty of Medicine, University of Miyazaki, Miyazaki, Japan
5. Department of Internal Medicine, Division of Hematology, Rheumatology and Respiratory Medicine, Faculty of Medicine, Kagawa University, Miki-cho, Japan
6. Department of Nephrology, Fujita Health University School of Medicine, Toyoake, Japan
7. Department of Nephrology, Faculty of Medicine, University of Tsukuba, Tsukuba, Japan
8. Department of Nephrology and Dialysis, Kitano Hospital, Tazuke Kofukai Medical Research Institute, Osaka, Japan
9. Department of Nephrology and Rheumatology, Kyorin University School of Medicine, Tokyo, Japan
10. Okayama University, Okayama, Japan