Department of Internal Medicine, Division of Gastroenterology, University of Colorado Anschutz Medical Center, Aurora, Colorado, USA. Rocky Mountain Regional Veterans Affairs Medical Center, Aurora, Colorado, USA. Department of Internal Medicine, Division of Gastroenterology, Veterans Affairs Greater Los Angeles Healthcare System, Los Angeles, California, USA. Vatche and Tamar Manoukian Division of Digestive Diseases and Jonsson Comprehensive Cancer Center, David Geffen School of Medicine, University of California, Los Angeles, California, USA. Department of Internal Medicine, Division of Gastroenterology, Veterans Affairs Medical Center, White River Junction Vermont and the Geisel School of Medicine at Dartmouth, Hanover, New Hampshire, USA. University of Connecticut School of Medicine, Farmington, Connecticut, USA. Department of Gastroenterology, Hepatology and Nutrition, Cleveland Clinic, Cleveland, Ohio, USA. National Gastroenterology and Hepatology Program, Veterans Health Administration and the Department of Medicine, Division of Gastroenterology, University of Washington School of Medicine, Seattle, Washington, USA. Department of Internal Medicine, Division of Gastroenterology, New York University Langone Health, New York, New York, USA. Department of Internal Medicine, Division of Gastroenterology, Massachusetts General Hospital, Boston, Massachusetts, USA. Department of Internal Medicine, Division of Gastroenterology, Minneapolis Veterans Affairs Medical Center and University of Minnesota, Minneapolis, Minnesota, USA.