1 The Vatche and Tamar Manoukian Division of Digestive Diseases, Department of Medicine, David Geffen School of Medicine, University of California, Los Angeles; Department of Medicine, David Geffen School of Medicine, University of California, Los Angeles.
2 Department of Medicine, David Geffen School of Medicine, University of California, Los Angeles; Division of Health Services Research, David Geffen School of Medicine, University of California, Los Angeles.
3 Department of Medicine, David Geffen School of Medicine, University of California, Los Angeles.
4 The Vatche and Tamar Manoukian Division of Digestive Diseases, Department of Medicine, David Geffen School of Medicine, University of California, Los Angeles.
5 University of California Health, University of California Davis Medical Center, Sacramento.
6 Division of Geriatrics, David Geffen School of Medicine, University of California, Los Angeles; VA Greater Los Angeles Healthcare System Geriatrics Research Education & Clinical Center (GRECC), Los Angeles, Calif.
7 The Vatche and Tamar Manoukian Division of Digestive Diseases, Department of Medicine, David Geffen School of Medicine, University of California, Los Angeles; Division of Gastroenterology, Department of Medicine, VA Greater Los Angeles Healthcare System, Los Angeles, Calif; UCLA Kaiser Permanente Center for Health Equity, Jonsson Comprehensive Cancer Center, Los Angeles, Calif. Electronic address: fmay@mednet.ucla.edu.