1. Department of Anaesthesiology, University Hospital Greifswald, Ferdinand-Sauerbruch Straße, 17489 Greifswald, Germany
2. Department of Anaesthesiology, Intensive Care and Pain Therapy, Münster University Hospital, Albert-Schweitzer-Campus 1, Geb. A1, 48149 Münster, Germany
3. Emergency Department, Klinikum Wolfsburg, Sauerbruchstr. 7, 38440 Wolfsburg, Germany
4. Institute of Biostatistics and Clinical Research, Faculty of Medicine, University of Münster, Schmeddingstraße 56, 48149 Münster, Germany
5. City of Dortmund Fire Department, Emergency Medical Director, Steinstraße 25, 44122 Dortmund, Germany
6. Klinikum Westfalen, Knappschaftskrankenhaus Dortmund, Emergency Medical Department, Wieckesweg 27, 44309 Dortmund, Germany
7. City of Münster Fire Service, Yorkring 25, 48159 Münster, Germany