1. The Royal Orthopaedic Hospital, Birmingham, UK
2. The Robert Jones and Agnes Hunt, Oswestry, UK
3. Royal Devon and Exeter Hospital, Exeter, UK
4. University Medical Center Utrecht, Utrecht, The Netherlands
5. Maastricht University Medical Centre, Maastricht, The Netherlands
6. Department of Biomedical Sciences, Humanitas University, Milan, Italy
7. IRCCS Humanitas Research Hospital, Milan, Italy
8. OCM Clinic, Munich, Germany
9. Department of Orthopedics and Traumatology, Gent University, Ghent, Belgium
10. TETEC AG, Reutlingen, Germany
11. LinkCare GmbH, Ludwigsburg, Germany
12. Department of Health Sciences, Hamburg University of Applied Sciences, Hamburg, Germany