1. Fred Hutchinson Cancer Research Center; Seattle WA USA
2. University of Washington Medical Center; Seattle WA USA
3. SWOG Statistical Center; Seattle WA USA
4. James P. Wilmot Cancer Center; University of Rochester; Rochester NY USA
5. Fox Chase Cancer Center; Temple University School of Medicine; Philadelphia PA USA
6. Arizona Cancer Center; University of Arizona; Tucson AZ USA
7. Heartland NCORP/Saint Francis Medical Center; Cape Girardeau MO USA
8. Southeast Cancer Consortium-Upstate NCORP/Kingsport Hem & Onc Associates; Kingsport TN USA
9. Wichita NCORP/Cancer Center of Kansas; Wichita KS USA
10. Brigham and Women's Hospital; Boston MA USA
11. University of Chicago Hospitals; Chicago IL USA