Jane Onken1, Lin Chang2, Fasiha Kanwal3. 1. Division of Gastroenterology, Duke University Medical Center, Durham, North Carolina. 2. Vatche and Tamar Manoukian Division of Digestive Diseases, David Geffen School of Medicine at UCLA, Los Angeles, California. 3. Section of Gastroenterology and Hepatology, Baylor College of Medicine, Houston, Texas.