1. Hepatology, Department of Visceral Surgery and Medicine, Inselspital Bern and Bern University, Freiburgstrasse 4, 8010 Bern, Switzerland
2. Clinic of Gastroenterology and Hepatology, University Hospital Zurich, Zurich, Switzerland
3. Clinic of Gastroenterology, Department of Internal Medicine, GZO Wetzikon, Wetzikon, Switzerland
4. Department of Microbiology, Tumor and Cell Biology, Science for Life Laboratory, Karolinska Institutet, Stockholm, Sweden
5. Faculty of Medicine, University of Zurich, Zurich, Switzerland
6. Department of Visceral Surgery and Medicine, Inselspital Bern and Bern University, Bern, Switzerland