1. Department of Cardiovascular Medicine, Clinician-Investigator Training Program (J.R.G.), Mayo Clinic, Rochester, MN.
2. Department of Cardiovascular Medicine, Division of Heart Rhythm Services (P.A.N., M.J.A.), Mayo Clinic, Rochester, MN.
3. Department of Pediatric and Adolescent Medicine, Division of Pediatric Cardiology (M.J.A.), Mayo Clinic, Rochester, MN.
4. Department of Molecular Pharmacology and Experimental Therapeutics, Windland Smith Rice Sudden Death Genomics Laboratory (M.J.A.), Mayo Clinic, Rochester, MN.