Division of Cardiology, Department of Medicine, University of Arkansas for Medical Sciences, Little Rock, AR. Department of Medicine, University of Mississippi, Jackson, MS. Division of Cardiology, Department of Medicine, Duke University, Durham, NC; Duke Clinical Research Institute, Durham, NC. Division of Cardiology, Department of Medicine, University Texas Southwestern, and Parkland Health and Hospital System, Dallas, TX. Duke Clinical Research Institute, Durham, NC. Division of Cardiology, Department of Medicine, Duke University, Durham, NC; Duke Clinical Research Institute, Durham, NC. Electronic address: marat.fudim@duke.edu.