1. Geisinger Medical Center – Department of Gastroenterology and Hepatology, Danville, Pennsylvania, United States
2. University of Connecticut Health Center – Gastroenterology and Hepatology, Farmington, Connecticut, United States
3. Geisinger Medical Center – Department of Gastroenterology and Nutrition, Danville, Pennsylvania, United States
4. University of Alabama at Birmingham – Gastroenterology and Hepatology, Birmingham, Alabama, United States
5. Henry Ford Hospital – Gastroenterology, Detroit, Michigan, United States
6. Henry Ford Hospital – Gastroenterology and Hepatology, Detroit, Michigan, United States
7. Department of Internal Medicine – Guthrie Robert Packer Hospital, Sayre, Pennsylvania, United States