1. Yale School of Medicine, New Haven, CT
2. SWOG Statistical Center, Seattle, WA
3. Duke Cancer Center, Durham, NC
4. Vanderbilt-Ingram Cancer Center, Nashville, TN
5. Kaiser Permanente Medical Group/NCORP, Bellflower CA
6. Kaiser Permanente Medical Group/NCORP, Portland, OR
7. University of Rochester Medical Center, Rochester, NY
8. UC Davis Comprehensive Cancer Center, Sacramento, CA