1 Department of Hepatology and Gastroenterology, Campus Virchow-Klinikum, Charité-Universitaetsmedizin Berlin, Berlin, Germany.
2 Berlin Institute of Health (BIH), Berlin, Germany.
3 Liver Failure Group, Institute for Liver and Digestive Health, University College London, Royal Free Campus, London, UK.
4 Division of Hepatology, Department of Medicine II, Leipzig University Medical Center, Liebigstr. 20, 04103, Leipzig, Germany. thomas.berg@medizin.uni-leipzig.de.