1. Medical Department I/Gastroenterology, Sana Hospital Lichtenberg, Berlin, Germany
2. Department of Visceral Surgery and Medicine, Inselspital, Bern University Hospital, University of Bern, Bern, Switzerland
3. Medical Department II, Helios Klinikum Meiningen, Germany
4. Department of Gastroenterology, Leeds Teaching Hospitals NHS Trust, Leeds, United Kingdom
5. Translational Gastroenterology Unit, Oxford University Hospitals, Oxford, United Kingdom
6. Department of Endoscopy Center, Shengjing Hospital of China Medical University, Liaoning Province, China
7. Department Allgemeine Innere Medizin der Kliniken (DAIM) Hirslanden Beau Site, Salem und Permanence, Bern, Switzerland.