1. Cancer Prevention and Control Program, Cancer Center, University of California, San Diego, La Jolla, CA
2. Division of Research, Kaiser Permanente Medical Group, Oakland, CA
3. Department of Epidemiology and Preventive Medicine, University of California, Davis, CA
4. Center for Research on Minority Health, University of Texas M. D. Anderson Cancer Center, Houston, TX
5. Center for Health Research, Kaiser Permanente Medical Group, Inc., Portland, OR
6. Stanford Center for Research in Disease Prevention, Stanford University, Palo Alto, CA
7. Arizona Cancer Center, Tucson, AZ