1. From the Divisions of Hypertension and Nephrology (Y.D., Y.I., F.Y., S.-i.H., S.N., Y.Ka.), and Laboratory Medicine (Y.Ku.), Department of Medicine, National Cerebral and Cardiovascular Center, Osaka, Japan; Department of Geriatric Medicine and Nephrology (K.K.), Osaka University Graduate School of Medicine, Osaka, Japan; Third Department of General Medicine (T.H.), Kawasaki Hospital, Kawasaki Medical School, Kawasaki, Japan.