1. Northwestern University; Chicago IL
2. Yale University; New Haven CT
3. University of Pennsylvania; Philadelphia PA
4. Intermountain Medical Center; Salt Lake City UT
5. Beth Israel Deaconess Medical Center; Boston MA
6. Optum Population Health Solutions; Minneapolis MN
7. Baylor University Medical Center; Dallas TX
8. University of Cincinnati; Cincinnati OH
9. United Network of Organ Sharing; Richmond VA
10. Cedars Sinai Heart Institute; Los Angeles CA
11. LifeCenter Norwest; Seattle WA
12. University of California San Francisco; San Francisco CA
13. University of Massachusetts; Worcester MA
14. Columbia University; New York NY
15. Loma Linda University; San Diego CA