| Affiliation: | 1. Division of Pediatric Cardiology, Department of Pediatrics, University of Michigan School of Medicine, Ann Arbor, Michigan;2. Division of Pediatric Cardiology, Department of Pediatrics, University of Washington School of Medicine, Seattle, Washington;3. Division of Pediatric Cardiology, Department of Pediatrics, University of Cincinnati College of Medicine, Cincinnati, Ohio;4. Division of Pediatric Cardiology, Department of Pediatrics, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania |
