1. University of Utah; Salt Lake City Utah
2. Division of Pediatric Cardiology; Ann & Robert H. Lurie Children's Hospital of Chicago; Illinois
3. Division of Pediatric Cardiology; C.S. Mott Children's Hospital; Ann Arbor Michigan
4. Division of Pediatric Cardiology; University of Missouri; Kansas City Missouri
5. Division of Pediatric Cardiology; University of Texas Health Science Center; Houston Texas
6. Rush University Medical Center; Chicago Illinois
7. Division of Pediatric Cardiology; Mercy Medical Center; Des Moines Iowa
8. Division of Pediatric Cardiology; St Louis Children's Hospital; St Louis Missouri
9. Division of Pediatric Cardiology; Le Bonheur Children's Medical Center; Tennessee
10. Mayo Clinic; Rochester Minnesota
11. Division of Pediatric Cardiology; Children's Hospital of UPMC; Pittsburgh Pennsylvania
12. Division of Pediatric Cardiology; Cincinnati Children's Hospital Medical Center; Ohio
13. Division of Pediatric Cardiology; Loma Linda University Children's Hospital; California