1. Massachusetts General Hospital, Boston, MA
2. Methodist Hospital, St. Louis Park, MN
3. University of Texas Southwestern Medical Center, Dallas, TX
4. Johns Hopkins University School of Medicine, Baltimore, MD
5. Jefferson Hospital, Allegheny Health Network, Jefferson Hills, PA
6. Emory University School of Medicine at Grady Hospital, Atlanta, GA
7. Vanderbilt University Medical Center, Nashville, TN
8. University of Chicago Medical Center, Chicago, IL
9. Dartmouth-Hitchcock Medical Center, Dartmouth, NH
10. College of American Pathologists, Northfield, IL
11. Memorial Sloan Kettering Cancer Center, New York, NY
12. University of Toronto, Toronto, Ontario, Canada