1. Department of Internal Medicine III; Division of Gastroenterology and Hepatology; Medical University of Vienna; Vienna Austria
2. Department of Internal Medicine IV; Wilhelminenspital; Vienna Austria
3. Department of Internal Medicine I; Medical University of Innsbruck; Innsbruck Austria
4. Department of Internal Medicine IV; Ordensklinikum Linz; Elisabethinen; Linz Austria
5. Department of Internal Medicine; Krankenhaus Oberndorf; Teaching hospital of the Paracelsus Private Medical University of Salzburg; Oberndorf Austria
6. Department of Internal Medicine; Division of Gastroenterology and Hepatology; Medical University of Graz; Graz Austria
7. Department of Internal Medicine; Kaiser-Franz-Josef-Spital; Vienna Austria
8. Department of Internal Medicine I; Paracelsus University of Salzburg; Salzburg Austria
9. Department of Internal Medicine II; University Clinics St. Pölten; St. Pölten Austria
10. Department of Internal Medicine; Landeskrankenhaus Hall; Tirol Austria
11. Department of Internal Medicine I; Klinikum Wels-Grieskirchen; Wels Austria