1. AstraZeneca Gaithersburg Maryland USA
2. Digestive Disease Research Center Medical University South Carolina Charleston South Carolina USA
3. Duke University Medical Center Durham North Carolina USA
4. Durham VA Medical Center Durham North Carolina USA
5. AstraZeneca Freiburg Germany
6. Division of Gastroenterology, Hepatology & Nutrition East Carolina University Greenville North Carolina USA
7. Greenville VA Health Care Center Greenville North Carolina USA