1. Orthopaedic Research Unit, Aarhus University Hospital Aarhus Denmark
2. Institute of Clinical MedicineAarhus University Hospital Aarhus Denmark
3. Department of Orthopaedic SurgeryHorsens Regional Hospital Horsens Denmark
4. Department of Orthopaedic SurgeryAarhus University Hospital Aarhus Denmark
5. Department of Clinical BiochemistryAarhus University Hospital Aarhus Denmark