1 Department of Gastroenterology, Hepatology and Endocrinology, Hannover Medical School, Carl-Neuberg Straße 1, 30163, Hannover, Germany. stahl.klaus@mh-hannover.de.
2 Department of Anaesthesiology and Intensive Care Medicine, University Hospital Bonn, Bonn, Germany.
3 Institute of Intensive Care Medicine, University Hospital Zurich, Zurich, Switzerland.
4 Department of Nephrology, Hannover Medical School, Hannover, Germany.