1. Cedars‐Sinai Heart Institute Los Angeles CA
2. Stanford University Stanford CA
3. University of Michigan Ann Arbor MI
4. University of Pennsylvania Philadelphia PA
5. Medical University of South Carolina Charleston SC
6. Drexel University Philadelphia PA
7. Columbia University New York NY
8. Newark Beth Israel Medical Center Newark NJ
9. Duke University Durham NC
10. University of Chicago Chicago IL
11. Baylor University Medical Center Dallas TX
12. University of Utah Salt Lake City UT