1. DCH Medical Center, University of Alabama, Tuscaloosa, Alabama
2. Digestive Diseases Institute, Virginia Mason Medical Center, Seattle, Washington
3. Carilion Roanoke Memorial Hospital, Roanoke, Virginia
4. Rapides Regional Medical Center, Alexandria, Louisiana
5. University of Nevada, Las Vegas, Nevada
6. Cleveland Clinic Foundation, Cleveland, Ohio
7. Division of Gastroenterology and Hepatology, University of Utah School of Medicine, Salt Lake City, Utah, USA