1. Henry Ford Hospital, Detroit, Michigan
2. NRG Oncology Statistics and Data Management Center, Philadelphia, Pennsylvania3Sidney Kimmel Comprehensive Cancer Center, Johns Hopkins University, Baltimore, Maryland
3. Mayo Clinic, Rochester, Minnesota
4. Washington University, St Louis, Missouri
5. MD Anderson Cancer Center, Houston, Texas
6. Helen F. Graham Cancer Center, Christiana Care Health System, Newark, Delaware
7. USON Texas Oncology Cancer Center, Sugar Land
8. Michigan Cancer Research Consortium, Community Clinical Oncology Program (CCOP), Ann Arbor
9. Florida Radiation Oncology Group/Baptist Regional Cancer Institute, Jacksonville
10. Helen F. Graham Cancer Center, Christiana Care Health System and Christiana Care CCOP, Newark, Delaware
11. Emory University, Atlanta, Georgia
12. Kansas City CCOP, Prairie Village, Kansas
13. UPMC Cancer Center, Pittsburgh, Pennsylvania
14. Montana Cancer Consortium CCOP, Billings
15. Memorial Sloan Kettering Cancer Center, New York, New York
16. The Ottawa Hospital Cancer Centre, Ottawa, Ontario, Canada
17. NRG Oncology Statistics and Data Management Center, Philadelphia, Pennsylvania
18. University of Texas Southwestern Medical School, Dallas