1. Department of Radiology, University of Washington School of Medicine, Seattle, WA, USA.
2. Fred Hutchinson Cancer Center, Seattle, WA, USA.
3. Kaiser Permanente Washington Health Research Institute, Seattle, WA, USA.
4. Department of Health Systems Science, Kaiser Permanente Bernard J. Tyson School of Medicine Pasadena, CA, USA.
5. Department of Medicine, University of Washington School of Medicine, Seattle, WA, USA.
6. Department of Medicine, University of California San Francisco, San Francisco, CA, USA.
7. Department of Veterans Affairs, University of California San Francisco, San Francisco, CA, USA.
8. Department of Epidemiology and Biostatistics, University of California San Francisco, San Francisco, CA, USA.
9. Division of Biostatistics, Department of Public Health Sciences, University of California Davis School of Medicine, Davis, CA, USA.
10. The Dartmouth Institute for Health Policy and Clinical Practice, Geisel School of Medicine at Dartmouth, Lebanon, NH, USA.
11. Norris Cotton Cancer Center, Geisel School of Medicine at Dartmouth, Lebanon, NH, USA.
12. Department of Population Medicine, Harvard Pilgrim Health Care Institute, Harvard Medical School, Boston, MA, USA.
13. The Daffodil Centre, University of Sydney and Cancer Council New South Wales, Kings Cross, New South Wales, Australia.
14. Huntsman Cancer Institute, University of Utah, Salt Lake City, UT, USA.