1. Penn State Hershey Cancer Institute; Hershey Pennsylvania
2. ECOG-ACRIN Biostatistics Center; Dana-Farber Cancer Institute; Boston Massachusetts
3. Johns Hopkins University; Baltimore Maryland
4. Memorial Sloan Kettering Cancer Center; New York New York
5. National Cancer Institute; Rockville Maryland
6. Decatur Memorial Hospital; Decatur Illinois
7. Albert Einstein Cancer Center; Philadelphia Pennsylvania
8. Colorado Cancer Research Program; Denver Colorado
9. HealthEast Cancer Care; Maplewood Minnesota
10. West Virginia University; Morgantown West Virginia
11. Emory University; Atlanta Georgia
12. University of Texas Southwestern Medical Center; Dallas Texas