1. University of California, San Francisco, CA
2. McMaster University, Hamilton, ON, Canada
3. University of Bergen, Bergen, Norway
4. University of Maryland, Baltimore, MD
5. Department of Laboratory Medicine, University of Washington, Seattle, WA
6. Hennepin County Medical Center, Minneapolis, MN
7. Baylor College of Medicine, Houston, TX
8. Thomas Jefferson University, Philadelphia, PA
9. University of Texas Southwestern, Dallas, TX
10. Brigham and Womens Hospital, Boston, MA
11. Massachusetts General Hospital, Boston, MA
12. Mayo Clnic, Rochester, MN