1. Heart Institute, Cincinnati Children's Hospital; Cincinnati Ohio USA
2. Cardiology Care for Children; Lancaster Pennsylvania USA
3. Boston Children's Hospital; Boston Massachusetts USA
4. Nationwide Children's; Columbus Ohio USA
5. The Heart Center at Arnold Palmer Hospital for Children; Orlando Florida USA
6. University of Michigan Congenital Heart Center; Ann Arbor Michigan USA
7. Johns Hopkins All Children's Hospital and Florida Hospital for Children; St. Petersburg Florida USA
8. Johns Hopkins University School of Medicine; Baltimore Maryland USA
9. Children's Hospital & Medical Center; Omaha Nebraska USA
10. Sisters-by-Heart, El Segundo; California USA
11. Children's Healthcare of Atlanta; Atlanta Georgia USA