1. Arnold Palmer Hospital for Children and the University of Central Florida College of Medicine, Department of Pediatrics/Cardiology; Orlando FL
2. Children's Hospital of Michigan, Department of Pediatrics/Cardiology; Detroit Michigan
3. Wayne State University, Department of Pediatrics, Pharmacology; Detroit Michigan
4. University of Iowa Children's Hospital, Department of Pediatrics/Cardiology; Iowa City Iowa
5. University of Georgia, Department of Statistics; Athens Georgia
6. Mayo Clinic, Department of Pediatrics/Cardiology; Rochester Minnesota
7. University of Colorado, Department of Pediatrics/Cardiology; Denver
8. Instituto Dante Pazzanese De Cardiologia and Hospital Do Coração Da Associação Sanatório Sírio, Department of Pediatrics/Cardiology; São Paulo Brazil
9. Duke University, Department of Pediatrics/Cardiology; Durham North Carolina
10. Miami Children's Hospital, Department of Pediatrics/Cardiology; Miami Florida
11. Advocate Children's Hospital and the University of Illinois, Department of Pediatrics/Cardiology; Oak Lawn Illinois
12. University of Minnesota Amplatz Children's Hospital, Department of Pediatrics/Cardiology; Minneapolis Minneapolis
13. Evelina London Children's Hospital; London, Department of Paediatrics/Cardiology United Kingdom
14. University of California San Francisco, Department of Pediatrics/Cardiology; San Francisco CA
15. Ann and Robert H. Lurie Children's Hospital, Department of Pediatrics/Cardiology; Chicago Illinois