1. Northwestern University; Chicago Illinois
2. University of Alberta; Edmonton AB Canada
3. Leiden University Medical Center; Leiden Netherlands
4. UCSF Medical Center; San Francisco California
5. Emory University School of Medicine; Atlanta Georgia
6. Johns Hopkins University; Baltimore Maryland
7. UAB School of Medicine; Birmingham Alabama
8. UCLA Pathology & Laboratory Medicine; Los Angeles California
9. University of Toronto; Toronto ON Canada
10. Baylor University Medical Center; Dallas Texas
11. Brigham and Women’s’ Hospital; Boston Massachusetts
12. University of North Carolina; Chapel Hill North Carolina
13. University of Michigan; Ann Arbor Michigan
14. University of Pittsburg Medical Center; Pittsburgh Pennsylvania
15. University of Pennsylvania; Philadelphia Pennsylvania
16. Cleveland Clinic; Cleveland Ohio
17. University of Colorado; Denver Colorado
18. Hopital Saint Louis; Paris France
19. Washington University School of Medicine; St. Louis Missouri
20. Duke University School of Medicine; Durham North Carolina
21. Ceder-Sinai Medical Center; Los Angeles California
22. University of Texas; San Antonio Texas
23. Dallas VA Medical Center; Dallas Texas
24. Royal Brompton & Harefield NHS Foundation Trust; Harefield UK
25. Mayo Clinic; Rochester Minnesota
26. Cambridge University Hospitals; Cambridge UK
27. University of Cincinnati; Cincinnati Ohio
28. University of Manitoba; Winnipeg MB Canada