1. Division of Biostatistics, Department of Public Health Sciences, University of California Davis School of Medicine, Davis
2. Kaiser Permanente Washington Health Research Institute, Kaiser Permanente Washington, Seattle
3. Departments of Medicine and Epidemiology and Biostatistics, University of California, San Francisco
4. General Internal Medicine Section, Department of Veterans Affairs, University of California, San Francisco
5. Kaiser Permanente Bernard J. Tyson School of Medicine, Pasadena, California
6. San Francisco Coordinating Center, California Pacific Medical Center Research Institute, San Francisco
7. Department of Radiology, University of North Carolina, Chapel Hill
8. Huntsman Cancer Institute, Department of Population Health Sciences, University of Utah, Salt Lake City
9. Division of Epidemiology and Biostatistics, University of Illinois at Chicago, Chicago
10. Office of Health Promotion Research, University of Vermont Cancer Center, Department of Surgery, Larner College of Medicine at the University of Vermont, Burlington
11. Norris Cotton Cancer Center, The Dartmouth Institute for Health Policy and Clinical Practice, Geisel School of Medicine at Dartmouth, Lebanon, New Hampshire
12. Department of Radiology, University of Washington School of Medicine, Seattle
13. Hutchinson Institute for Cancer Outcomes Research, Seattle, Washington
14. Department of Health Services, University of Washington School of Public Health, Seattle