1. Division of Nephrology and Endocrinology, University of Tokyo School of Medicine, Tokyo;
2. Molecular and Cellular Nephrology, Institute of Medical Science, Tokai University School of Medicine, Isehara;
3. Department of Medicine, Mitsui Memorial Hospital, Tokyo;
4. Department of Internal Medicine, Laboratory for Structure and Function Research, Isehara, Japan
5. Tokai University School of Medicine, Isehara, Japan