1. Department of Research and Development, Prehospital Emergency Medical Services, Central Denmark Region, Aarhus, Denmark
2. Department of Anaesthesiology, Aarhus University Hospital, Aarhus, Denmark
3. Danish Air Ambulance, Denmark
4. Department of Quality and Health Technology, Faculty of Health Sciences, University of Stavanger, Stavanger, Norway
5. Norwegian Air Ambulance Foundation, Oslo, Norway
6. Danish Center for Clinical Health Services Research, Department of Clinical Medicine, Aalborg University and Aalborg University Hospital, Aalborg, Denmark