1. Ahmanson/UCLA Adult Congenital Heart Disease Center Los Angeles California USA
2. Sidra Heart Center at Sidra Medicine Doha Qatar
3. Rush University Medical Center Chicago Illinois USA
4. Stanford UniversityLucile Packard Children's Hospital Stanford California USA
5. Institut de Cardiologie de Montreal Montreal Quebec Canada
6. The Hospital for Sick Children Toronto Ontario Canada
7. Columbus Ohio Adolescent and Adult Congenital Heart Disease and the Pulmonary Hypertension ProgramThe Ohio State University Columbus Ohio USA
8. Cleveland Clinic Cleveland Ohio USA
9. Toronto General Hospital Toronto Ontario Canada
10. UC Davis Medical Center Sacramento California USA
11. Massachusets General Hospital Boston Massachusetts USA
12. University of Colorado Denver Denver Colorado USA
13. Mattel Children's Hospital at UCLA Los Angeles California USA