1. Division of Clinical Nephrology and Rheumatology, Niigata University Graduate School of Medical and Dental Sciences, Japan
2. Health Administration Center, Niigata University, Japan
3. Division of Nephrology and Rheumatology, Nagaoka Red Cross Hospital, Japan
4. Division of Pathology, Niigata University Graduate School of Medical and Dental Sciences, Japan
5. School of Health Sciences, Faculty of Medicine Niigata University, Medical Laboratory Science, Japan