1. Department of Gastroenterology and Hepatology, University Hospital Basel, Switzerland
2. Department of General, Visceral and Transplantation Surgery, University Hospital, Heidelberg, Ruprecht Karls University, Heidelberg
3. Dr. von Haunersches Children’s Hospital, Ludwig Maximilian University, Munich
4. German Society of Digestive and Metabolic Diseases (DGVS), Berlin
5. Department of General Internal Medicine, Christian Albrechts University, Kiel
6. Surgical Clinic and Polyclinic at the Rechts der Isar Hospital, Technical University, Munich
7. Department of General, Visceral and Thoracic Surgery at the University Medical Centre Hamburg-Eppendorf
8. Department of Internal Medicine, Specialisation Gastroenterology, Haematology and Oncology, Nephrology German Red Cross (DRK) Hospital Berlin-Köpenick
9. General Surgery, Thoracic, Vascular and Transplantation Surgery, University of Rostock
10. Department of Medicine, Israelitic Hospital Hamburg
11. Department of General, Visceral and Paediatric Surgery, University Hospital Dusseldorf of the Heinrich Heine University
12. Surgical Gastroenterology, Gastrocentrum, Karolinska University Hospital Huddinge
13. Department for Gastroenterology, Kanton Hospital Liestal, Medical University Clinic
14. Department of Medicine C at the Hospital of the City Ludwigshafen/Rhine gGmbH
15. Division of Gastroenterology and Metabolic Disease, Clinics of South Essen
16. Department of Medicine 2 at the Rechts der Isar Hospital, Technical University Munich
17. Institute for Radiodiagnostics at the University Hospital of Regensburg
18. Internal Medicine IV, Dept. for Gastroenterology and Hepatology, University Hospital Vienna
19. Department of Paediatric Medicine, Children’s Hospital Munich Schwabing, Technical University of Munich