1. Department of Clinical Sciences of Companion Animals, Faculty of Veterinary Medicine, Utrecht University, Utrecht, The Netherlands;
2. Department of Orthopaedics, University Medical Centre Utrecht, Utrecht, The Netherlands;
3. Department of Rheumatology and Clinical Immunology, University Medical Centre Utrecht, Utrecht, The Netherlands;
4. Department of Pathobiology, Faculty of Veterinary Medicine, Utrecht University, Utrecht, The Netherlands;
5. DSM Biomedical, Geleen, the Netherlands;
6. Department of Orthopaedics, University Medical Centre Maastricht, Maastricht, The Netherlands