1. Department of Anaesthesiology and Intensive Care; Aarhus University Hospital; Aarhus Denmark
2. Department of Heart Disease; Aarhus University Hospital; Skejby Denmark
3. Department of Abdominal Surgery; Horsens Regional Hospital; Horsens Denmark
4. Health; VIA University College; Aarhus Denmark
5. Aarhus University Hospital, Department of Anaesthesiology and Intensive Care, Nørrebrogade 44, building 21.1; 8000 Aarhus C Denmark
6. Institute of Public Health; Section of Nursing, Aarhus University, Høegh-Guldbergs Gade 6A; Building 1633, 8000 Aarhus C Denmark