1. Duke University Medical Center, Durham, North Carolina2Duke Clinical Research Institute, Durham, North Carolina
2. Duke Clinical Research Institute, Durham, North Carolina
3. University of Colorado, Denver
4. Division of Cardiology, University of California, Los Angeles
5. Mayo Clinic, Rochester, Minnesota
6. Boston University School of Medicine, Boston, Massachusetts
7. Lankenau Institute for Medical Research, Wynnewood, Pennsylvania
8. College of Physicians and Surgeons, Columbia University, New York, New York
9. School of Medicine, Penn State University, Hershey, Pennsylvania
10. Mid-America Heart Institute, Kansas City, Missouri