1. Division of Kidney and Hypertension, Department of Internal Medicine, Jikei University School of Medicine, Tokyo
2. Division of Nephrology, Tokai University School of Medicine, Kanagawa
3. Akane Foundation, Tsuchiya General Hospital, Hiroshima
4. Department of Nephrology and Hypertension, Jikei University School of Medicine, Tokyo
5. 2nd Department of Internal Medicine, Nagasaki University School of Medicine, Nagasaki
6. Department of Nephrology, Tokorozawa Kidney Clinic, Saitama
7. Baxter Limited, Tokyo, Japan