1. Division of Cardiology, Department of Medicine, University of Texas Southwestern Medical Center, Dallas (J.A.d.L.).
2. Division of Cardiology, Department of Medicine, Duke Clinical Research Institute, Duke University Medical Center, Durham, NC (L.K.N.).
3. British Heart Foundation Centre for Cardiovascular Science and Usher Institute of Population Health Sciences and Informatics, University of Edinburgh, United Kingdom (N.L.M.).