1. Pre‐hospital division, Air ambulance department Oslo university hospital Oslo Norway
2. The Norwegian air ambulance foundation Drøbak Norway
3. Faculty of health sciences University of Stavanger Stavanger Norway
4. Department of Anaesthesia and Intensive Care Biomedical and Clinical Sciences Linköping University Linkoping Sweden
5. Department of Anaesthesiology, Intensive Care and Pain Medicine University of Helsinki and Helsinki University Hospital Helsinki Finland
6. Department of Anaesthesia and Intensive Care Medicine Landspitali University Hospital Reykjavík Iceland
7. Faculty of Medicine University of Iceland Reykjavik Iceland
8. Department of Anaesthesia Tampere University Hospital Tampere Finland
9. Faculty of Medicine and Life Sciences University of Tampere Tampere Finland
10. Department of Intensive Care Copenhagen University Hospital Rigshospitalet Copenhagen Denmark
11. Collaboration for Research in Intensive Care (CRIC) Copenhagen Denmark