1. Department of Pediatrics and Labatt Family Heart Centre, Hospital for Sick Children, University of Toronto, Toronto, Canada;
2. Department of Pediatrics, Michigan Medicine, Medical School, University of Michigan, Ann Arbor, Michigan;
3. Department of Cardiology, Boston Children’s Hospital and Department of Pediatrics, Harvard Medical School, Harvard University, Boston, Massachusetts;
4. New England Research Institutes, Watertown, Massachusetts;
5. Division of Pediatric Cardiothoracic Surgery, Children’s Hospital of Philadelphia, Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania;
6. Department of Pediatrics, Children’s Healthcare of Atlanta, Emory University, Atlanta, Georgia;
7. Department of Pediatrics, Primary Children’s Hospital, University of Utah, Salt Lake City, Utah;
8. Division of Pediatric Cardiology, Maine Medical Center, Portland, Maine;
9. Departments of Surgery and
10. Department of Surgery, Nemours Cardiac Center, Alfred I du Pont Hospital for Children, Wilmington, Delaware;
11. The Heart Institute of Florida, St Petersburg, Florida;
12. Department of Pediatrics, Cincinnati Children’s Hospital Medical Center, Cincinnati, Ohio;
13. Department of Pediatrics, Medical University of South Carolina, Charleston, South Carolina;
14. Children’s Heart Institute, Children’s Hospital of Orange County, Orange, California;
15. National Heart, Lung, and Blood Institute, Bethesda, Maryland;
16. Department of Pediatrics, School of Medicine, Duke University, Durham, North Carolina;
17. Department of Pediatrics, East Carolina University, Greenville, North Carolina;
18. Department of Pediatrics, Wake Forest University, Winston-Salem, North Carolina; and
19. Department of Pediatrics, Children’s Hospital Los Angeles, Los Angeles, California
20. Pediatrics, Herma Heart Institute, Children’s Wisconsin and Medical College of Wisconsin, Milwaukee, Wisconsin;