1. Division of Gastroenterology and Hepatology; Department of Internal Medicine III; Medical University of Vienna; Vienna Austria
2. Division of Hematology and Hemostaseology; Department of Internal Medicine I; Medical University of Vienna; Vienna Austria
3. Department of Laboratory Medicine; Medical University of Vienna; Vienna Austria
4. Department of Gastroenterology and Hepatology, Endocrinology, and Nephrology; Klinikum Klagenfurt am Woerthersee; Klagenfurt Austria