1. Division of Cardiology, Department of Medicine, University of Colorado Anschutz Medical Campus, Aurora (C.C.S., B.N.).
2. Division of Cardiology, Department of Pediatrics, University of Colorado Anschutz Medical Campus, Children’s Hospital Colorado, Aurora (A.E.P., S.D.M.).
3. Department of Biomedical Informatics, University of Colorado School of Medicine, Aurora (A.K.-F.).
4. Department of Medicine, Division of Cardiology, Harvard Medical School, Brigham and Women’s Hospital, Boston, MA (J.P., C.Y.H.).