1. Heart Institute, Department of Pediatrics Pittsburgh Children's Hospital Medical Center Pittsburgh PA USA
2. Heart Institute Department of Pediatrics, Cincinnati Children's Hospital Medical Center Cincinnati OH USA
3. Department of Cardiology Boston Children's Hospital Boston MA USA
4. Ahmanson/UCLA Adult Congenital Heart Disease Center David Geffen School of Medicine at UCLA Los Angeles CA USA
5. Division of Congenital and Structural Cardiology University Hospitals Leuven Leuven Belgium
6. Department of Cardiology: Adult Congenital and Valvular Heart Disease University Hospital Muenster Muenster Germany
7. Adult Congenital Heart Disease Service and Pulmonary Hypertension Service Royal Prince Alfred Hospital Sydney Australia
8. Department of Cardiac Surgery and Children's National Heart Institute Children's National Hospital Washington DC USA
9. Division of Pediatric Cardiology, Department of Pediatrics Medical College of Wisconsin Milwaukee WI USA
10. Division of Cardiology, Department of Pediatrics, The Children's Hospital of Philadelphia, Perelman School of Medicine University of Pennsylvania School of Medicine Philadelphia PA USA
11. Heart Institute, UPMC Children's Hospital of Pittsburgh University of Pittsburgh School of Medicine Pittsburgh PA USA
12. Congenital Cardiac Centre for Adults, Peter Munk Cardiac Centre University Health Network Toronto Canada
13. Congenital Heart Center, C.S. Mott Children's Hospital University of Michigan Ann Arbor MI USA
14. Division of Cardiology, Department of Pediatrics Stanford University School of Medicine Santa Clara CA USA
15. Adult Congenital Heart Disease Service, Heart Centre King Faisal Specialist Hospital and Research Centre Riyadh Saudi Arabia