1. Center for Surgical Science Department of Surgery Zealand University Hospital Koege Denmark
2. Centre for Anaesthesiological Research Department of Anaesthesiology Zealand University Hospital Koege Denmark
3. Department of Anaesthesia and Intensive Care Bispebjerg and Frederiksberg Hospital University of Copenhagen Copenhagen Denmark
4. Department of Orthopaedic Surgery University Clinic for Hand, Hip and Knee Surgery Regional Hospital West Jutland Holstebro Denmark
5. Department of Anaesthesiology Regional Hospital West Jutland Holstebro Denmark
6. Unit for Thrombosis Research Department of Clinical Biochemistry Hospital of South West Denmark Esbjerg Denmark