1. Surgical Department; Lovisenberg Diakonale Hospital; Oslo Norway
2. Department of Nursing Science; Faculty of Medicine; University of Oslo; Blindern Oslo Norway
3. Department of Family Health Care Nursing; University of California; San Francisco CA USA
4. Department of Research and Development; Lovisenberg Diakonale Hospital; Oslo Norway
5. Division of Emergencies and Critical Care; Department of Research and Development; Oslo University Hospital; Oslo Norway
6. Lovisenberg Diakonale University College; Oslo Norway
7. Postoperative Department; Lovisenberg Diakonale Hospital; Oslo Norway
8. Department of Research; Lovisenberg Diakonale Hospital; Oslo Norway