1 Department of Intensive Care Medicine, University Hospital RWTH Aachen, Aachen, Germany; 3CARE-Cardiovascular Critical Care & Anesthesia Evaluation and Research, Aachen, Germany.
2 Department of Anesthesiology, University Hospital RWTH Aachen, Aachen, Germany.
3 3CARE-Cardiovascular Critical Care & Anesthesia Evaluation and Research, Aachen, Germany; Department of Anesthesiology and Intensive Care Medicine, University Hospital Würzburg, Würzburg, Germany. Electronic address: christian.stoppe@gmail.com.