1. Department of Anesthesiology, Intensive Care and Pain Medicine, University Hospital Münster, Münster, Germany
2. Department of Anesthesiology, Intensive Care and Pain Medicine, University Hospital Knappschaftskrankenhaus Bochum, Bochum, Germany
3. Department of Anesthesiology, Department of Anesthesiology and Critical Care, Franziskus Hospital Münster, Münster, Germany
4. Department of Anesthesiology, Intensive Care and Pain Medicine, Florence-Nightingale-Hospital, Düsseldorf, Germany
5. Department of Anesthesiology and Operative Intensive Care Medicine, Kliniken Köln, Köln, Germany, Witten/Herdecke University, Faculty of Health, School of Medicine
6. Department of Anesthesiology and Intensive Care Medicine, Kliniken Maria Hilf, Mönchengladbach, Germany
7. Faculty of Medicine and University Hospital of Cologne, Department of Anesthesiology and Intensive Care Medicine, University of Cologne, Cologne, Germany
8. Department of Anesthesiology, Intensive Care and Pain Medicine, Klinikum Dortmund, Dortmund, Germany
9. Department of Anesthesiology and Intensive Care Medicine, University Hospital Bonn, Bonn, Germany
10. Department of Anesthesiology, University Hospital Heidelberg, Heidelberg, Germany
11. Department of Anesthesiology, Intensive Care and Pain Medicine, Dortmund-Hörde, Germany
12. Department of Anesthesiology, Medical Faculty, RWTH Aachen University, Aachen, Germany
13. Institute of Biostatistics and Clinical Research, University of Münster, Münster, Germany
14. Department of Outcomes Research, Anesthesiology Institute, Cleveland Clinic, Cleveland, Ohio