1 Department of Internal Medicine III Division of Gastroenterology and Hepatology Vienna General Hospital, Medical University of Vienna, Vienna, Austria.
2 Department of Internal Medicine I, University of Bonn, Bonn, Germany.
3 European Foundation for the Study of Chronic Liver Failure, Barcelona, Spain.
4 Faculty of Health Sciences, University of Southern Denmark, Odense, Denmark.
5 Institute for Bioengineering of Catalonia, Barcelona, Spain.