1 Medicine-Gastroenterology, Duke University Medical Center, Durham, North Carolina.
2 Section of Gastroenterology and Hepatology, Baylor College of Medicine, Houston, Texas.
3 Vatche and Tamar Manoukian Division of Digestive Diseases, UCLA GI Fellowship Program, G. Oppenheimer Center for Neurobiology of Stress and Resilience, David Geffen School of Medicine at UCLA, Los Angeles, California.