| Affiliation: | 1. Orthopaedic surgeon, Isala Clinics Zwolle, PO Box 10500, 8000 GM Zwolle, The Netherlands;2. Health scientist, Reinier de Graaf Hospital, PO Box 5011, 2600 GA Delft, The Netherlands;3. Orthopaedic Surgeon, Maasland Hospital, PO Box 5500, 6130 MB Sittard, The Netherlands;4. Biologist, Orthopaedic Research Laboratory, University Medical Centre St Radboud Nijmegen, PO Box 9101, 6500 HB Nijmegen, The Netherlands;5. Professor of Orthopaedic surgery, University Medical Centre Groningen, PO Box 30001, 9700 RB Groningen, The Netherlands |
