1. Pre‐Hospital Division, Air Ambulance Department Oslo University Hospital Oslo Norway
2. Institute of Clinical Medicine, University of Oslo Oslo Norway
3. The Norwegian Air Ambulance Foundation Oslo Norway
4. Department of Anaesthesia and Intensive Care, Medicine and Health Linköping University Linköping Sweden
5. Department of Anaesthesia Tampere University Hospital Tampere Finland
6. Wellbeing Services County of Pirkanmaa, and Faculty of Medicine and Health Technology Tampere University Tampere Finland
7. Department of Anaesthesiology, Intensive Care and Pain Medicine University of Helsinki and Helsinki University Hospital Helsinki Finland
8. Department of Anaesthesia and Intensive Care Medicine Landspitali University Hospital Reykjavík Iceland
9. Faculty of Medicine University of Iceland Reykjavik Iceland
10. Department of Intensive Care Copenhagen University Hospital—Rigshospitalet Copenhagen Denmark
11. Department of Clinical Medicine University of Copenhagen Copenhagen Denmark