1. Danish Air Ambulance Aarhus Denmark
2. Prehospital Research Unit, Region of South Denmark Odense Denmark
3. Department of Anesthesiology and Intensive Care Medicine Odense University Hospital Svendborg Svendborg Denmark
4. Department of Anesthesiology and Intensive Car E Medicine Rigshospitalet Copenhagen Denmark
5. Danish Armed Forces Health Services Aarhus Denmark
6. Department of Anesthesiology and Intensive Care Medicine Sygehus Lillebælt Kolding Denmark
7. Norsk Luftambulanse A/S Oslo Norway
8. Department of Anesthesiology Aarhus University Hospital Aarhus Denmark