1. Department of Gastroenterology, Hepatology and Infectious Diseases Otto‐von‐Guericke University Hospital Magdeburg Germany
2. Leeds Gastroenterology Institute St. James's University Hospital Leeds UK
3. Leeds Institute of Medical Research at St. James’s University of Leeds Leeds UK
4. Gastroenterology Clinic Henry Dunant Hospital Athens Greece
5. Department of Internal Medicine II Ludwig Maximilians University Hospital of Munich Munich Germany