1. Department of Anesthesiology; Hässleholm Hospital and Lund University; Hässleholm Sweden
2. Lundbeck Centre for Fast-Track Hip and Knee Arthroplasty; Copenhagen Denmark
3. Department of Surgical Pathophysiology; Rigshospitalet; Copenhagen University; Copenhagen Denmark
4. Department of Orthopedic Surgery; Hässleholm Hospital and Lund University; Hässleholm Sweden