1. Institute of Health; Section of Nursing Science; Aarhus University; Aarhus Denmark
2. Slagelse Hospital Region Zealand; Slagelse Denmark
3. Department of Anesthesiology; Aarhus University Hospital; Aarhus Denmark
4. Research Unit of Nursing; Faculty of Health Sciences; University of Southern Denmark; Odense M Denmark
5. Section of Health Services Research Lillebaelt Hospital; Denmark/University of Southern Denmark; Vejle Denmark