1. Division of Gastroenterology and Hepatology, Oregon Health and Science University, Portland, OR
2. Center for Advanced Endoscopy, Beth Israel Deaconess Medical Center and Harvard Medical School, Boston, Massachusetts, United States
3. Division of Gastroenterology and Hepatology, University of Michigan, Ann Arbor, Michigan, United States
4. Division of Gastroenterology, NYU Langone Medical Center, New York, New York, United States
5. Division of Gastroenterology, VA NY Harbor Healthcare System, New York, New York, United States
6. Division of Gastroenterology, Brigham and Women’s Hospital, Boston, Massachusetts, United States
7. Department of Surgery, University of Michigan, Ann Arbor, MI