Wake Forest University School of Medicine, Wake Forest University, Winston-Salem, NC: Gregory L. Burke, MD. ECG Reading Center, Wake Forest University: Pentti Rautaharju, MD, PhD. University of California, Davis: John Robbins, MD, MHS. The Johns Hopkins University, Baltimore, Md: Linda P. Fried, MD, MPH. MRI Reading Center, The Johns Hopkins University: Nick Bryan, MD, PhD; Norm J. Beauchamp, MD. University of Pittsburgh, Pittsburgh, Pa: Lewis H. Kuller, MD. Echocardiography Reading Center (baseline), University of California, Irvine: Julius M. Gardin, MD. Echocardiography Reading Center (follow-up), Georgetown Medical Center, Washington, DC: John Gottdiener, MD. Ultrasound Reading Center, New England Medical Center, Boston, Mass: Daniel H. O'Leary, MD. Central Blood Analysis Laboratory, University of Vermont, Burlington: Russell P. Tracy, PhD. Pulmonary Reading Center, University of Arizona, Tucson: Paul Enright, MD. Retinal Reading Center, University of Wisconsin, Madison: Ron Klein, MD. Coordinating Center, University of Washington, Seattle: Richard A. Kronmal, PhD. Project Officer, National Heart, Lung, and Blood Institute, Bethesda, Md: Diane Bild, MD, MPH.