1. Department of Radiology, University of Washington School of Medicine, Seattle
2. Department of Health Services, University of Washington School of Public Health, Seattle
3. Kaiser Permanente Washington Health Research Institute, Seattle, Washington
4. Huntsman Cancer Institute, Department of Population Health Sciences, University of Utah, Salt Lake City
5. Department of Radiology, University of North Carolina at Chapel Hill
6. Department of Epidemiology, University of North Carolina at Chapel Hill
7. Department of Medicine, University of California, San Francisco
8. Department of Epidemiology and Biostatistics, University of California, San Francisco
9. General Internal Medicine Section, Department of Veterans Affairs, University of California, San Francisco
10. Department of Surgery, University of Vermont Cancer Center, Burlington
11. Department of Radiology, University of Vermont Cancer Center, Burlington
12. Division of Epidemiology and Biostatistics, School of Public Health, University of Illinois at Chicago
13. The Dartmouth Institute for Health Policy and Clinical Practice, Norris Cotton Cancer Center, Geisel School of Medicine at Dartmouth, Lebanon, New Hampshire
14. Division of General Internal Medicine, Massachusetts General Hospital, Harvard Medical School, Boston, Massachusetts
15. Department of Radiology, Geisel School of Medicine at Dartmouth, Lebanon, New Hampshire
16. Division of Biostatistics, Department of Public Health Sciences, University of California, Davis, School of Medicine
17. Kaiser Permanente Washington Health Research Institute, Kaiser Permanente Washington, Seattle