1. Department of Anaesthesiology and Intensive Care Medicine University Medical Center Schleswig‐Holstein, Campus Kiel Kiel Germany
2. Department of Cardiovascular Surgery University Medical Center Schleswig‐Holstein, Campus Kiel Kiel Germany
3. Institute of Medical Informatics and Statistics Christian‐Albrechts‐University Kiel, University Medical Center Schleswig‐Holstein, Campus Kiel Kiel Germany
4. Department of Anesthesiology Helios Kliniken Schwerin Schwerin Germany