1. Center for Valve and Structural Heart Disease; Minneapolis Heart Institute at Abbott Northwestern Hospital; Minneapolis Minnesota
2. Department of Cardiovascular Diseases; Mayo Clinic; Rochester Minnesota
3. Childrens Health Dallas; University of Texas Southwestern Medical Center; Dallas Texas
4. Division of Cardiovascular Medicine; University of Utah School of Medicine; Salt Lake City Utah
5. Section of Cardiology; Temple University; Philadelphia Pennsylvania
6. Cardiovascular Division; Brigham and Women's Hospital; Boston Massachusetts
7. Division of Cardiology; Tufts University School of Medicine; Boston Massachusetts
8. Cardiology Services; University of California Irvine; Irvine California
9. Division of Cardiology; Westchester Medical Center; Valhalla New York