1. From the Duke Clinical Research Institute, Duke University Medical Center, Durham, NC (A.N.V., D.D., T.Y.W., M.T.R., M.R.P., E.D.P., S.V.R.); Department of Cardiovascular Medicine, University of Michigan, Ann Arbor (H.G.); Division of Cardiology, Washington University School of Medicine, St. Louis, MO (A.P.A.); Department of Medicine, University of Colorado Anschutz Medical Campus, Aurora (J.C.M.); Division of Cardiovascular Medicine, Department of Medicine, University of California-San Diego (E.M....