1. Department of Anesthesiology, Intensive Care, and Emergency Medicine, Artemed St. Josef's Hospital, Freiburg, Germany
2. Center for Resuscitation Science, Department of Clinical Science and Education Södersjukhuset, Karolinska Institutet. Stockholm, Sweden
3. University of Cologne, Faculty of Medicine and University Hospital Cologne, Department of Anaesthesiology and Intensive Care Medicine, Cologne, Germany