1. Division of Gastroenterology and Hepatology; Department of Internal Medicine III; Medical University of Vienna; Vienna Austria
2. Department of Internal Medicine 2; Division of Gastroenterology and Hepatology; Universitätsklinikum; St. Pölten Austria
3. Department of Internal Medicine II; Division of Gastroenterology and Hepatology; Medical University of Innsbruck; Innsbruck Austria
4. Department of Gastroenterology; Hospital Elisabethinen; Linz Austria
5. Department of Internal Medicine; Division of Gastroenterology and Hepatology; Medical University of Graz; Graz Austria
6. Department of Gastroenterology and Hepatology; Paracelsus Medical University Salzburg; Salzburg Austria
7. Department of Internal Medicine; Landeskrankenhaus Hall; Hall/Tirol Austria
8. Department of Transplant Surgery; Medical University of Vienna; Vienna Austria
9. Klinikum Wels-Grieskirchen; Wels Austria