1. Department of Medicine, Division of Gastroenterology and Hepatology, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, USA
2. Department of Visceral Surgery and Medicine, Inselspital, Bern University Hospital, University of Bern, Switzerland
3. Institut d’Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS) and CIBERehd, University of Barcelona, Spain
4. Internal Medicine IV, Jena University Hospital, Friedrich Schiller University, Jena, Germany
5. Department of Gastroenterology and Hepatology, Odense University Hospital, Odense, Denmark; Institute of Clinical Research, University of Southern Denmark, Odense, Denmark
6. Department of Gastroenterology, Montefiore Medical Center, Albert Einstein College of Medicine, Bronx, NY, USA
7. Division of Gastroenterology and Hepatology, Mayo Clinic, Rochester, MN, USA
8. Yale University, New Haven, USA; VA-CT Healthcare System, West Haven, CT, USA