1. Department of Medicine, Indiana University, Indianapolis, Indiana, USA
2. Department of Medicine, Jefferson Digestive Disease Institute, Thomas Jefferson University, Philadelphia, Pennsylvania, USA
3. Nashville GI Associates, Nashville, Tennessee, USA
4. Premier Gastroenterology of Texas, Dallas, Texas, USA
5. Division of Gastroenterology, MedStar Georgetown University Hospital, Washington, DC, USA
6. Northside Gastroenterology, Indianapolis, Indiana, USA
7. Department of Medicine, University of Texas San Antonio, San Antonio, Texas, USA
8. Connecticut GI, Hartford, Connecticut, USA
9. Digestive Health Associates of Texas, Dallas, Texas, USA
10. Wisconsin Center for Advanced Research, St. Luke’s Medical Center, Milwaukee, Wisconsin, USA