1. Hutchinson Institute for Cancer Outcomes Research, Fred Hutchinson Cancer Research Center, Seattle, Washington
2. Fred Hutchinson Cancer Research Center, Seattle, Washington
3. SWOG (formerly the Southwest Oncology Group) Statistics and Data Management Center, Seattle, Washington
4. Rogel Cancer Center, University of Michigan, Ann Arbor
5. Cancer Therapy and Evaluation Program, National Cancer Institute, Bethesda, Maryland
6. Division of Gastroenterology, University California San Diego Moores Cancer Center, San Diego
7. Department of General Internal Medicine, University of Texas, MD Anderson Cancer Center, Houston
8. Department of Oncology, Kaiser Permanente–Lonetree, Lonetree, Colorado
9. Department of Oncology, Kaiser Permanente Medical Center, Oakland, California
10. National Cancer Institute Community Oncology Research Program of the Carolinas, Greenville Health System National Cancer Institute Community Oncology Research Program, Greenville, South Carolina
11. Gulf South Minority–Underserved National Cancer Institute Community Oncology Research Program, Louisiana State University Health Sciences Center, Shreveport
12. Department of General Oncology, University of Texas, MD Anderson Cancer Center, Houston
13. Division of Hematology/Oncology, Herbert Irving Comprehensive Cancer Center, Columbia University, New York, New York