1. Department of Internal Medicine III, Division of Gastroenterology and Hepatology Medical University of Vienna Vienna Austria
2. Department of Internal Medicine I Medical University of Innsbruck Innsbruck Austria
3. Department of Internal Medicine IV Wilhelminenspital Vienna Austria
4. Department of Internal Medicine, Division of Gastroenterology and Hepatology Medical University of Graz Graz Austria
5. Department of Internal Medicine IV Ordensklinikum Linz Linz Austria
6. Department of Internal Medicine Kaiser‐Franz‐Josef‐Spital Vienna Austria
7. Department of Internal Medicine I Paracelsus University of Salzburg Austria
8. Department of Internal Medicine II Kepler University Clinics Linz Austria
9. Department of Internal Medicine Krankenhaus Oberndorf, Teaching hospital of the Paracelsus Private Medical University of Salzburg Oberndorf Austria
10. Department of Internal Medicine I Krankenhaus Hietzing Vienna Austria
11. Department of Internal Medicine II University Clinics St. Poelten St. Pölten Austria
12. Department of Internal Medicine Landeskrankenhaus Hall Tirol Austria
13. Center for Virology Medical University of Vienna Vienna Austria
14. Department of Internal Medicine I Klinikum Wels‐Grieskirchen Wels Austria