1. Department of Clinical Biochemistry, Aarhus University Hospital, Aarhus, Denmark
2. Department of Clinical Medicine, University of Aarhus, Aarhus, Denmark
3. Department of Orthopedic Surgery, Regional Hospital Viborg, Viborg, Denmark
4. Department of Orthopedic Surgery, Aarhus University Hospital, Aarhus, Denmark
5. Department of Clinical Biochemistry, Aalborg University Hospital, Aalborg, Denmark
6. Department of Clinical Medicine, Aalborg University Hospital, Aalborg, Denmark