1. Department of Anesthesiology and Intensive Care, Institute of Clinical Sciences Sahlgrenska Academy, University of Gothenburg Gothenburg Sweden
2. Department of Anesthesiology and Intensive Care Sahlgrenska University Hospital Gothenburg Sweden
3. Department of Public Health and Community Medicine, Institute of Medicine Sahlgrenska Academy, University of Gothenburg Gothenburg Sweden
4. Department of Anesthesiology and Intensive Care Northern Älvsborgs Hospital, Region Västra Götaland Trollhättan Sweden