1. Johns Hopkins University, Baltimore, Maryland
2. Massachusetts General Hospital, Boston, Massachusetts
3. University of Alabama Birmingham, Birmingham, Alabama
4. Dana-Farber Cancer Institute, Boston, Massachusetts
5. Cleveland Clinic, Cleveland, Ohio
6. University of California Los Angeles, Los Angeles, California
7. University of Minnesota, Minneapolis, Minnesota
8. Mayo Clinic, Rochester, Minnesota
9. National Cancer Institute, Bethesda, Maryland
10. Yale University, New Haven, Connecticut