1. Division of CardiologySeattle Children's HospitalSeattle Washington
2. Division of CardiologyUniversity of Texas Southwestern Medical CenterDallas Texas
3. Division of Pediatric CardiologyUniversity of VirginiaCharlottesville Virginia
4. Division of Pediatric CardiologyWashington University School of MedicineSt. Louis Missouri
5. Division of Pediatric Cardiology, Department of Pediatrics, The Lillie Frank Abercrombie Section of Cardiology, Texas Children's Hospital, Baylor College of MedicineHouston Texas
6. Department of CardiologyThoraxcenter, Erasmus Medical CenterRotterdam The Netherlands
7. Department of Pediatric Cardiology and Congenital Heart DiseaseDeutsches Herzzentrum MünchenMünchen Germany
8. Division of Pediatric CardiologyChildren's Healthcare of Atlanta, Emory UniversityAtlanta Georgia
9. Department of Cardiothoracic SurgeryLucille Packard Children's Hospital at StanfordPalo Alto California