1. Department of Research Norwegian Air Ambulance Foundation Oslo Norway
2. Department of Anaesthesiology and Intensive Care Vestre Viken Hospital Trust Drammen Norway
3. Division of Prehospital Services, Institute of Clinical Medicine University of Oslo Oslo Norway
4. Norwegian National Advisory Unit on Prehospital Emergency Medicine Oslo University Hospital Oslo Norway
5. Department of Anaesthesiology, Division of Emergencies and Critical Care Oslo University Hospital, Rikshospitalet Oslo Norway
6. Division of Emergencies and Critical Care Institute of Clinical Medicine, University of Oslo Oslo Norway
7. Norwegian National Advisory Unit on Trauma, Division of Emergencies and Critical Care Oslo University Hospital Oslo Norway