1. Department of Research, Sint Maartenskliniek , Nijmegen, The Netherlands
2. Department of Orthopaedic Surgery, Radboud University Medical Center , Nijmegen, The Netherlands
3. Department of Orthopaedics and Traumatology, AZ Alma , Eeklo, Belgium
4. Department of Human Structure and Repair, Ghent University , Ghent, Belgium
5. Department of Orthopedics, Sint Maartenskliniek , Nijmegen, The Netherlands
6. Department of Rheumatology, Radboud University Medical Center , Nijmegen, The Netherlands