Department of Gastroenterology, Hepatology and Endocrinology, Hannover Medical School, Hannover, Germany. Department of Nephrology and Hypertension, Hannover Medical School, Hannover, Germany. Department of Respiratory Medicine and German Centre of Lung Research (DZL), Hannover Medical School, Hannover, Germany. Institute of Intensive Care Medicine, University Hospital Zurich, Zurich, Switzerland. Department of Anesthesiology and Intensive Care Medicine, University Hospital Bonn, Bonn, Germany. Medilys Laborgesellschaft mbH, Hamburg, Germany. Department of Nephrology and Hypertension, Hannover Medical School, Hannover, Germany. sascha.david@usz.ch. Institute of Intensive Care Medicine, University Hospital Zurich, Zurich, Switzerland. sascha.david@usz.ch.