1. Division of Gastroenterology and Hepatology Department of Internal Medicine III Medical University of Vienna Vienna Austria
2. Vienna Hepatic Hemodynamic LaboratoryMedical University of Vienna Vienna Austria
3. Internal Medicine IV Ordensklinikum Linz Barmherzige Schwestern Linz Austria
4. Gastroenterology and Multivisceral Transplant Unit Department of Surgery, Oncology, and Gastroenterology Padua University Hospital Padua Italy
5. General Internal Medicine and Thrombotic and Hemorrhagic Diseases Unit Department of Medicine Padua University Hospital Padua Italy