1. Department of Anaesthesiology, Centre for Anaesthesiological Research Zealand University Hospital Køge Denmark
2. Department of Anaesthesiology Bispebjerg and Frederiksberg Hospital Copenhagen Denmark
3. Department of Orthopaedic Surgery and Traumatology Bispebjerg Hospital Copenhagen Denmark
4. Department of Clinical Medicine University of Copenhagen Copenhagen Denmark
5. Department of Anaesthesiology, Research Centre of Anaesthesiology and Intensive Care Medicine Næstved‐Slagelse‐Ringsted Hospitals Ringsted Denmark
6. Department of Regional Health Research, The Faculty of Health Sciences University of Southern Denmark Odense Denmark
7. Copenhagen Trial Unit, Centre for Clinical Intervention Research, Rigshospitalet Copenhagen University Hospital Copenhagen Denmark