1. Anaesthesia and Critical Care Research Group; Faculty of Health Sciences; University of Tromsø; Tromsø Norway
2. Department of Anaesthesiology and Intensive Care; Finnmark Health Trust; Hammerfest Hospital; Hammerfest Norway
3. Norwegian National Advisory Unit on Trauma; Division of Emergencies and Critical Care; Oslo University Hospital; Oslo Norway
4. Faculty of Health Sciences; Department of Health and Care Sciences; UiT The Arctic University of Norway; Tromsø Norway
5. Department of Health Studies; Faculty of Social Sciences; University of Stavanger; Stavanger Norway
6. Department of Research and Development; Norwegian Air Ambulance Foundation; Drøbak Norway