1. Division of Gastroenterology, John T. Milliken Department of Medicine, Washington University in St. Louis School of Medicine, St. Louis, Missouri
2. Department of Radiology, Washington University in St. Louis School of Medicine, St. Louis, Missouri
3. Division of Abdominal Imaging, Mayo Clinic College of Medicine, Rochester, Minnesota
4. Division of Gastroenterology and Hepatology, Mayo Clinic College of Medicine, Rochester, Minnesota