1. Institute of Mathematics and Scientific Computing, University of Graz, Graz, Austria
2. Department of Anesthesiology and Intensive Care Medicine, Division of Anaesthesiology and Intensive Care Medicine 2, Medical University of Graz, Austria
3. City of Münster Fire Department, Germany
4. Department of Anesthesiology and Intensive Care Medicine, Division of Anesthesiology for Cardiovascular and Thoracic Surgery and Intensive Care Medicine, Medical University of Graz, Austria
5. Institute for Emergency Medicine, University Hospital Schleswig Holstein, Germany
6. Institute of Mathematics and Scientific Computing, University of Graz, Austria