1. Clinical Research Division, Fred Hutchinson Cancer Research Center, Seattle, Washington
2. Hutchinson Institute for Cancer Outcomes Research, Fred Hutchinson Cancer Research Center, Seattle, Washington
3. Division of Gastroenterology, University of Washington School of Medicine, Seattle
4. Department of Family Medicine, University of Washington School of Medicine, Seattle
5. Department of General Internal Medicine, University of Washington School of Medicine, Seattle
6. Department of Health Services, University of Washington School of Public Health, Seattle
7. Department of Internal Medicine, University of Utah School of Medicine, Salt Lake City