1. Division of Clinical Nephrology and Rheumatology, Kidney Research Center, Niigata University Graduate School of Medical and Dental Sciences, Niigata, Niigata, Japan
2. Department of Clinical Nutrition Science, Kidney Research Center, Niigata University Graduate School of Medical and Dental Sciences, Niigata, Niigata, Japan
3. Department of Applied Molecular Medicine, Kidney Research Center, Niigata University Graduate School of Medical and Dental Sciences, Niigata, Niigata, Japan
4. Rice Research Center, Kameda Seika Co. Ltd, Niigata, Japan
5. Department of Pediatrics, Vanderbilt University Medical Center, Nashville, Tennesse, USA