1. Department of Clinical Medicine, Aarhus University, 8200 Aarhus N, Aarhus, Denmark
2. Orthopaedic Research Laboratory, Department of Orthopaedic Surgery & Traumatology, Odense University Hospital, 5000 Odense C, Odense, Denmark
3. Department of Clinical Research, University of Southern Denmark, 5000 Odense C, Odense, Denmark