1. Department of Cardiovascular Medicine (Clinician-Investigator Training Program) (J.R.G.)
2. Amsterdam UMC, University of Amsterdam, Heart Center and Department of Clinical and Experimental Cardiology, Amsterdam Cardiovascular Sciences, The Netherlands (K.V.V.L., F.K., C.v.d.W., A.A.M.W.).
3. Department of Pediatric and Adolescent Medicine (Division of Pediatric Cardiology) (R.K.R.)
4. Departments of Cardiovascular Medicine (Division of Heart Rhythm Services), Pediatrics (Division of Pediatric Cardiology), and Molecular Pharmacology and Experimental Therapeutics (Windland Smith Rice Sudden Death Genomics Laboratory), Mayo Clinic, Rochester, MN (D.J.T., J.M.B., M.J.A.).