1. Department of Medicine, Division of Interventional CardiologyColumbia University Medical Center New York New York
2. Department of Pediatrics, Division of Pediatric CardiologyMount Sinai Medical Center New York New York
3. Atrium HealthSanger Heart & Vascular Institute Charlotte North Carolina
4. Department of Pediatrics, Division of Pediatric CardiologyUniversity of Utah Salt Lake City Utah
5. Cincinnati Children's Hospital Medical Center Cincinnati Ohio
6. The Heart InstituteChildren's Hospital of Colorado Aurora Colorado
7. Children's Hospital of PhiladelphiaUniversity of Pennsylvania Philadelphia Pennsylvania