1. Division of Clinical Nephrology and Rheumatology, Kidney Research Center, Niigata University Graduate School of Medical and Dental Sciences, Japan
2. Department of Obstetrics and Gynecology, Niigata University Graduate School of Medical and Dental Sciences, Japan
3. Division of Pathology, Niigata University Medical and Dental Hospital, Japan
4. Department of Clinical Nutrition Science, Niigata University Graduate School of Medical and Dental Sciences, Japan