1. Danish Pain Research Center; Aarhus University Hospital; Aarhus Denmark
2. Department of Anaesthesiology; Aarhus University Hospital; Aarhus Denmark
3. Department of Orthopaedic Surgery; Aarhus University Hospital; Aarhus Denmark
4. Department of Cardiology; Aarhus University Hospital; Aarhus Denmark
5. Department of Psychology; Aarhus University; Aarhus Denmark
6. Department of Neurology; Aarhus University Hospital; Aarhus Denmark