1. Department of Orthopaedic Surgery and Traumatology, Odense University Hospital, Odense, Denmark
2. Department of Orthopaedic Surgery and Traumatology, Kolding Hospital – part of Hospital Lillebaelt, Kolding, Denmark
3. Department of Regional Health Research, University of Southern Denmark, Odense, Denmark
4. Department of Clinical Research, University of Southern Denmark, Odense, Denmark