1. Fred Hutchinson Cancer Research Center; Seattle Washington
2. Moffitt Cancer Center; Tampa Forida
3. Fred Hutchinson Cancer Research Center, Seattle, Washington, and University of Pittsburgh; Pittsburgh Pennsylvania
4. University of Minnesota; Minneapolis
5. Medical College of Wisconsin; Milwaukee
6. Stanford University Medical Center; Stanford California
7. Children's National Medical Center; Washington DC
8. Dana-Farber Cancer Institute; Boston Massachusetts
9. Vanderbilt University Medical Center; Nashville Tennessee
10. Memorial Sloan-Kettering Cancer Center; New York New York
11. National Cancer Institute, NIH; Bethesda Maryland
12. Johns Hopkins Hospital; Baltimore Maryland