1 Department of Nursing and Health Promotion, Faculty of Health Science Oslo Metropolitan University, and Department of Research and Development, Division of Emergencies and Critical Care, Oslo University Hospital Oslo, Norway. Electronic address: annekath@oslomet.no.
2 Department of Research and Development, Division of Emergencies and Critical Care, Oslo University Hospital, Oslo, Norway.
3 Division of Emergencies and Critical Care, Oslo University Hospital, and Department of Public Health, Faculty of Medicine, University of Oslo, Oslo, Norway.