1. Division of Gastroenterology and Hepatology, Duke University School of Medicine
2. Division of Gastroenterology, Durham Veteran’s Affairs Medical Center, Durham, NC
3. Division of Gastroenterology and Hepatology, Baylor University School of Medicine
4. Division of Gastroenterology, DeBakey Veteran’s Affairs Medical Center, Houston, TX
5. Division of Gastroenterology, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA