1. Division of Heart Rhythm Services, Department of Cardiovascular Diseases; Hospital of the University of Pennsylvania; Philadelphia Pennsylvania USA
2. Division of Cardiology; Hospital of the University of Pennsylvania; Philadelphia Pennsylvania USA
3. Division of Pediatric Cardiology, Department of Pediatrics; Hospital of the University of Pennsylvania; Philadelphia Pennsylvania USA
4. Department of Molecular Pharmacology & Experimental Therapeutics, Windland Smith Rice Sudden Death Genomics Laboratory; Hospital of the University of Pennsylvania; Philadelphia Pennsylvania USA