Division of Gastroenterology, Hepatology, and Nutrition, Vanderbilt University Medical Center, Nashville, Tennessee. Salt Lake City Specialty Care Center of Innovation and Gastroenterology Section, VA Salt Lake City Health Care System, Salt Lake City, Utah; Division of Gastroenterology and Hepatology, Department of Internal Medicine, University of Utah School of Medicine, Salt Lake City, Utah. Division of Nephrology and Hypertension, University of Kansas Medical Center, Kansas City, Kansas.