1. Department of Research and Development, Division of Emergencies and Critical Care, Oslo University Hospital, Rikshospitalet; Oslo Norway
2. Department of Post-operative and Critical Care, Division of Emergencies and Critical Care Oslo University Hospital, Rikshospitalet; Oslo Norway
3. Faculty of Medicine, University of Oslo; Oslo Norway
4. Department of Research and Development, Division of Emergencies and Critical Care, Oslo University Hospital, Ullevål; Oslo Norway
5. Institute of Health and Society, Department of Nursing Science, Faculty of Medicine, University of Oslo; Oslo Norway
6. Faculty of Health Sciences, Oslo and Akershus University Collage of Applied Sciences; Oslo Norway
7. Department of Anesthesiology, Division of Emergencies and Critical Care, Oslo University Hospital, Radiumhospitalet; Oslo Norway
8. Department of Pain Management and Reserch, Division of Emergencies and Critical Care, Oslo University Hospital; Oslo Norway