1. Department of Orthopaedic Surgery and Traumatology, Ghent University Hospital, Ghent, Belgium
2. Department of Orthopaedic Surgery and Traumatology, ZorgSaam Hospital, Terneuzen, The Netherlands
3. Department of Orthopaedic Surgery and Traumatology, Elisabeth Tweesteden Hospital, Tilburg/Waalwijk, The Netherlands
4. Department of Orthopaedics and Traumatology, Universitair Ziekenhuis Brussel, Brussels, Belgium