1. Department of Anaesthesiology and Intensive Care/Pain Centre , Sahlgrenska University Hospital , Region Västra Götaland , Gothenburg , Sweden
2. Department of Anaesthesiology and Intensive Care, Institute of Clinical Sciences at the Sahlgrenska Academy , University of Gothenburg , Gothenburg , Sweden
3. Frölunda Specialist Hospital , Region Västra Götaland , Gothenburg , Sweden
4. Department of Anaesthesiology and Intensive Care , Sahlgrenska University Hospital , Region Västra Götaland , Gothenburg , Sweden
5. Institute of Health and Care Sciences, Sahlgrenska Academy , University of Gothenburg , Gothenburg , Sweden
6. Faculty of Health Sciences, Department of Nursing and Health Promotion Acute and Critical Illness , Oslo Metropolitan University , Oslo , Norway