1. Department of Anesthesiology; Copenhagen University Hospital; Hvidovre Denmark
2. The Lundbeck Centre for Fast-track Hip and Knee Arthroplasty; Copenhagen Denmark
3. Nuffield Department of Clinical Neurosciences; John Radcliffe Hospital; University of Oxford; UK
4. Neurorestoration Group; Wolfson Centre for Age-Related Diseases; King's College London; UK
5. Department of Orthopedic Surgery; Copenhagen University Hospital; Hvidovre Denmark
6. Section of Surgical Pathophysiology; Copenhagen University Hospital; Rigshospitalet Denmark