| cincinnatichildrens.org | Cincinnati Children's Hospital Center of Gastroenterology and Nutrition Dep |
| mcmaster.ca | McMaster University Intestinal Disease Research Programme |
| iupui.edu | Indiana University Gastroenterology and Hepatology |
| columbia.edu | Division Of Digestive & Liver Diseases |
| ecu.edu | East Carolina University Department of Gastroenterology |
| ddrcir.org | Digestive Disease Research Center - Tehran University of Medical Sciences |
| clevelandclinic.org | Cleveland Clinic Foundation Division of Gastroenterology |
| chmkids.org | Children's Hospital of Michigan Department of Gastroenterology |
| ucalgary.ca | University of Calgary Gastrointestinal Research Group |
| radiologyinfo.org | Lower Gastrointestinal Tract Radiography |
United States , Maryland , Baltimore