1. Washington University in St Louis, St Louis, MO, USA
2. SMBD Jewish General Hospital, Montreal, QC, Canada
3. Brigham and Womens Hospital, Boston, MA, USA
4. The Toledo Hospital, Toledo, OH, USA
5. McMaster University, Hamilton, ON, Canada
6. Research Triangle International, Research Triangle Park, NC, USA
7. New York University School of Medicine, New York, NY, USA
8. University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
9. OK Health Sciences Center, Oklahoma City, OK, USA
10. Mid America Heart Institute, Kansas City, MO, USA
11. St Joseph’s Hospital, Orange, CA, USA
12. Massachusetts General Hospital, Boston, MA, USA