Masayuki Tanemoto1,2, Shingo Suenaga3. 1. Division of Nephrology, Department of Internal Medicine, International University of Health and Welfare School of Medicine, 13-1 Higashi-Kaigan-Cho, Atami, Shizuoka, 413-0012, Japan. mtanemoto-tky@umin.ac.jp. 2. Dialysis Unit, Shin-Kuki General Hospital, Saitama, Japan. mtanemoto-tky@umin.ac.jp. 3. Cardiovascular Center, Shin-Kuki General Hospital, Saitama, Japan.