University of Amsterdam - Amsterdam University Medical Centers, Harvard University - Harvard Medical School, Washington University in St. Louis - Division of Gastroenterology and Inflammatory Bowel Diseases Centre, Department of Medicine, Case Western Reserve University, Thomas Jefferson University, Technion-Israel Institute of Technology - Rambam Health Care Campus, Technion-Israel Institute of Technology - Rambam Health Care Campus, University of Amsterdam - Amsterdam University Medical Centers, University of Amsterdam - Amsterdam University Medical Centers, Leiden University and VU University Medical Centre - Department of Gastroenterology and Hepatology

Washington University in St. Louis - Division of Gastroenterology and Inflammatory Bowel Diseases Centre, Albert Einstein College of Medicine - Montefiore Medical Center, Division of Gastroenterology, Washington University in St. Louis - Division of Gastroenterology, Houston Methodist Hospital - Division of Gastroenterology and Hepatology, University of Texas Southwestern - Division of Digestive and Liver Diseases, University of Washington Medical Center - Division of Gastroenterology, Brooke Army Medical Center - Division of Gastroenterology, Baylor College of Medicine - Section of Gastroenterology and Hepatology, Medical College of Wisconsin - Division of Gastroenterology and Hepatology, Cleveland Clinic - Department of Gastroenterology, Hepatology, and Nutrition, Washington University in St. Louis - Division of Gastroenterology and Inflammatory Bowel Diseases Centre, Washington University in St. Louis - Bernard Becker Medical Library, University of Washington Medical Center - Division of Gastroenterology, Mayo Clinic - Division of Gastroenterology and Hepatology, University of Texas Southwestern - Division of Digestive and Liver Diseases, Houston Methodist Hospital - Division of Gastroenterology and Hepatology,, Icahn School of Medicine at Mount Sinai - Dr. Henry D. Janowitz Division of Gastroenterology and Washington University in St. Louis - Division of Gastroenterology and Inflammatory Bowel Diseases Centre