1. Department of Surgery and Trauma Surgery, Maastricht University Medical Centre, Maastricht, the Netherlands
2. Department of Orthopaedic Surgery, Zuyderland Medical Centre, Sittard Geleen, the Netherlands
3. Department of Orthopaedic Surgery, Maastricht University Medical Centre, Maastricht, the Netherlands
4. Department of Orthopaedic Surgery, Laurentius Hospital, Roermond, the Netherlands
5. Department of Surgery and Trauma Surgery, Zuyderland Medical Centre, Heerlen, the Netherlands
6. Department of Surgery and Trauma Surgery, VieCuri Medical Centre, Venlo, the Netherlands
7. Department of Surgery and Trauma Surgery, St Jans Gasthuis, Weert, the Netherlands