1. Max von Pettenkofer Institute of Hygiene and Medical Microbiology, Faculty of Medicine Ludwig Maximilian University of Munich (LMU Munich) Munich Germany
2. Department of Gastroenterology and Hepatology Cantonal Hospital St. Gallen St. Gallen Switzerland
3. Outpatient Clinic Ambulatory Services Rorschach Rorschach Switzerland
4. NMI Natural and Medical Sciences Institute at the University of Tübingen Reutlingen Germany
5. Clinical Trials Unit Cantonal Hospital St. Gallen St. Gallen Switzerland
6. Department of Visceral Surgery and Medicine Inselspital Bern University Hospital, University of Bern Bern Switzerland
7. Center for Laboratory Medicine St. Gallen Switzerland
8. Division of Infectious Diseases & Hospital Epidemiology Cantonal Hospital St. Gallen St. Gallen Switzerland
9. Translational Gastroenterology Unit, Nuffield Department of Medicine University of Oxford Oxford UK