1. Committee of Hypertension and Kidney Disease, Kanagawa Physicians Association, Yokohama, Japan.
2. Department of Medical Science and Cardiorenal Medicine, Yokohama City University Graduate School of Medicine, Yokohama, Japan.
3. Division of Nephrology, Endocrinology and Metabolism, Department of Internal Medicine, Tokai University School of Medicine, Isehara, Japan.