1. Department of Medicine, Division of Gastroenterology, University of Washington, Seattle, WA, USA
2. Department of Medicine, Division of Gastrointestinal and Liver Diseases, Keck School of Medicine of the University of Southern California, Los Angeles, CA, USA
3. Department of Radiology, Keck School of Medicine of the University of Southern California, Los Angeles, CA, USA
4. Department of Preventive Medicine, University of Southern California, Los Angeles, CA, USA
5. Department of Medicine, Division of Gastroenterology, Massachusetts General Hospital, Boston, MA, USA
6. Division of Gastroenterology and Hepatology, Warren Alpert Medical School of Brown University, Providence, RI, USA
7. Department of Surgery, Keck School of Medicine of the University of Southern California, Los Angeles, CA, USA
8. Hoag Hospital – Newport Beach, Irvine, CA, USA