1. Department of Research The Norwegian Air Ambulance Foundation Oslo Norway
2. Department of Anaesthesiology and Intensive Care Stavanger University Hospital Stavanger Norway
3. Faculty of Health Sciences University of Stavanger Stavanger Norway
4. Department of Emergency Medicine and Pre-Hospital Services St. Olavs Hospital Trondheim Norway
5. Department of Anaesthesiology Vestfold Hospital Trust Tønsberg Norway
6. Norwegian Trauma Registry Oslo University Hospital Oslo Norway
7. Pre-hospital Division Air Ambulance DepartmentOslo University Hospital Oslo Norway