1. Department of Pediatrics/Division of Pediatric Cardiology, University of Maryland School of Medicine; Baltimore Maryland, USA
2. Department of Pediatrics/Division of Pediatric Cardiology, Children's Mercy Hospital; Kansas City Missouri, USA
3. Department of Pediatrics/Division of Pediatric Cardiology, University of Florida; Jacksonville Florida, USA
4. Department of Pediatrics/Division of Pediatric Cardiology, Alfred I. DuPont Hospital for Children; Wilmington Delaware, USA
5. Department of Pediatrics/Division of Pediatric Cardiology, University of Virginia; Charlottesville Virginia, USA
6. Pediatrix Medical Group - Northwest Children's Heart Care; Tacoma Washington, USA
7. California Pacific Medical Center; San Francisco California, USA
8. Department of Pediatrics/Division of Pediatric Cardiology, University of Michigan Congenital Heart Center; Ann Arbor Missouri, USA
9. Department of Pediatrics/Division of Pediatric Cardiology, The Heart Center at Arnold Palmer Hospital for Children; Orlando Florida, USA
10. Janet Weis Children's Hospital; Danville Pennsylvania, USA
11. Department of Pediatrics/Division of Pediatric Cardiology, Seattle Children's Hospital, University of Washington; Seattle Washington, USA
12. Department of Pediatrics/Division of Pediatric Cardiology, Baylor College of Medicine and Texas Children's Hospital; Houston Texas, USA