1. Department of Operating Services, Division of Emergencies and Critical Care Oslo University Hospital Oslo Norway
2. Department of Nursing Science, Faculty of Medicine, Institute of Health and Society University of Oslo Oslo Norway
3. Department of Health and Caring Sciences Western Norway University of Applied Sciences Bergen Norway
4. Department of Research and Development, Division of Emergencies and Critical Care Oslo University Hospital Oslo Norway
5. Faculty of Health Sciences University of Stavanger Stavanger Norway
6. Operating Department Helse Stavanger HF Stavanger Norway