1. From the Department of Medicine, Beth Israel Deaconess Medical Center, Boston, MA (K.J.M., J.T., D.J.F., M.R.P.); Veterans Affairs San Diego Healthcare System and Division of Nephrology-Hypertension, University of California San Diego School of Medicine (J.H.I.); Department of Epidemiology, Graduate School of Public Health, University of Pittsburgh, PA (L.H.K.); and Department of Pathology and Laboratory Medicine, University of Vermont, Burlington (R.P.T.).