1. Division of Pediatric Cardiology, Department of Pediatrics; Mayo Clinic; Rochester Minnesota, USA
2. Division of Cardiovascular Diseases, Department of Medicine; Mayo Clinic; Rochester Minnesota, USA
3. Children's Hospital Colorado; Denver Colorado, USA
4. Loyola University Chicago Stritch School of Medicine; Maywood Illinois, USA
5. Division of Pediatric Cardiology, Department of Pediatrics; Medical University of South Carolina; Charleston South Carolina, USA
6. University of California, Los Angeles; Los Angeles California, USA
7. Division of Cardiology, Department of Pediatrics; University of Southern California; Los Angeles California, USA
8. Division of Pediatric Cardiology, Department of Pediatrics; Stanford University School of Medicine; Palo Alto California, USA
9. Asheville Cardiology Associates, Mission Health System; Asheville North Carolina, USA
10. Division of Cardiology, Department of Pediatrics; University of Pennsylvania Perelman School of Medicine; Philadelphia Pennsylvania, USA
11. Seattle Children's Hospital, University of Washington; Seattle Washington, USA
12. Division of Pediatric Cardiology, Department of Pediatrics; University of Rochester; Rochester New York, USA
13. Cardiology Care for Children; Lancaster Pennsylvania, USA
14. Division of Pediatric Cardiology, Department of Pediatrics; Cincinnati Children's Hospital; Cincinnati Ohio, USA