1. Department of Cardiology and Cardiovascular Surgery, Children's National Hospital The George Washington University Washington DC USA
2. Department of Pediatric Cardiology Monroe Carell Jr. Children's Hospital Nashville Tennessee USA
3. Section of Pediatric Cardiothoracic Surgery, St Louis Children's Hospital and School of Medicine Washington University St Louis Michigan USA
4. Pediatrics Medical University of South Carolina Charleston South Carolina USA
5. Pediatrics, Division of Cardiology University of Colorado, Denver Anschutz Medical Campus, Children's Hospital Colorado Aurora Aurora Colorado USA
6. Department of Cardiology Hospital for Sick Children Toronto Ontario Canada
7. Children's Hospital at Montefiore Bronx New York USA
8. Cleveland Clinic Children's Cleveland Ohio USA
9. Division of Pediatric Cardiology, Department of Pediatrics Columbia University College of Physician and Surgeons, Morgan Stanley Children's Hospital New York New York USA
10. Pediatric Cardiology Stanford University School of Medicine Palo Alto California USA
11. Congenital Heart Center, Division of Pediatric Cardiology University of Florida Gainesville Florida USA
12. Stollery Children's Hospital University of Alberta Edmonton Alberta Canada