1. Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts
2. St Joseph Mercy Hospital, Ann Arbor, Michigan
3. University of Nebraska Medical Center, Omaha
4. University Health Network, University of Toronto, Ontario, Canada
5. University of Texas MD Anderson Cancer Center, Houston
6. College of American Pathologists, Northfield, Illinois
7. Stanford University, Palo Alto, California
8. Columbia University Medical Center, New York, New York
9. Yale University School of Medicine, New Haven, Connecticut
10. Strong Memorial Hospital, University of Rochester Medical Center, Rochester, New York
11. Walter Reed National Military Medical Center, Bethesda, Maryland