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1 Division of Gastroenterology, Department of Medicine, University of Washington School of Medicine, Seattle, Washington; Department of Health Services, University of Washington School of Public Health, Seattle, Washington; Public Health Sciences Division, Fred Hutchinson Cancer Research Center, Seattle, Washington.
2 Robert G. Petersdorf Endowed Chair in Medicine, Department of Medicine, University of Washington School of Medicine, Seattle, Washington.
1 Division of Gastroenterology, Department of Medicine, University of Washington School of Medicine, Seattle, Washington; Department of Health Services, University of Washington School of Public Health, Seattle, Washington; Public Health Sciences Division, Fred Hutchinson Cancer Research Center, Seattle, Washington.
2 Robert G. Petersdorf Endowed Chair in Medicine, Department of Medicine, University of Washington School of Medicine, Seattle, Washington.