1. Department of Medical Oncology, Dana-Farber Cancer Institute, Boston, MA;
2. Cancer and Leukemia Group B (CALGB) Statistical Center, Duke University Medical Center, Durham, NC;
3. Stanford University School of Medicine, Stanford, CA;
4. Arizona Cancer Center, Tucson, AZ;
5. Duke University Medical Center, Durham, NC;
6. University of North Carolina, Chapel Hill, NC;
7. Fred Hutchinson Cancer Research Center, Seattle, WA; and
8. University of Chicago, Chicago, IL