Affiliation: | 1. Tamar and Vatche Manoukian Division of Digestive Diseases, Department of Medicine, David Geffen School of Medicine, University of California, Los Angeles, Los Angeles, California;3. Kaiser Permanente Center for Health Equity, Fielding School of Public Health, University of California, Los Angeles, Los Angeles, California;4. Jonsson Comprehensive Cancer Center, David Geffen School of Medicine, University of California, Los Angeles, Los Angeles, California |