1. University of Pittsburgh, Pittsburgh, PA, USA
2. Emory University, Atlanta, GA, USA
3. The University of Texas MD Anderson Cancer Center, Houston, TX, USA
4. University of Miami of Palm Beach Regional Campus/JFK Hospital, Atlantis, FL, USA
5. Massachusetts General Hospital, Harvard Medical School, Boston, MA, USA
6. University of Minnesota, Minneapolis, MN, USA
7. The Ohio State University Wexner Medical Center, Columbus, OH, USA
8. University of Buffalo, Buffalo, NY, USA
9. Abbott Northwestern Hospital, Minneapolis, MN, USA
10. Temple University, Philadelphia, PA, USA
11. Piedmont Heart Institute, Atlanta, GA, USA
12. University of Virginia, Charlottesville, VA, USA
13. Oklahoma Heart Institute, Tulsa, OK, USA
14. Wayne State University, Detroit, MI, USA
15. Michigan State University, East Lansing, MI, USA
16. University of Pennsylvania, Philadelphia, PA, USA
17. Saint Louis University, St. Louis, MO, USA
18. Henry Ford Hospital, Detroit, MI, USA
19. New York University, New York, NY, USA
20. University of Kentucky, Lexington, KY, USA
21. Cedars-Sinai Medical Center, Los Angeles, CA, USA
22. University of California, Los Angeles, CA, USA