1. Department of Orthopaedic Surgery, Leyenburg Hospital, The Hague, The Netherlands.
2. Department of Anatomy, Erasmus University, Rotterdam, The Netherlands.
3. Department of Biomedical Physics and Technology, Erasmus University, Rotterdam, The Netherlands.
4. Department of Epidemiology and Biostatistics, Erasmus University, Rotterdam, The Netherlands.
5. Department of Orthopaedic Surgery, University Hospital Rotterdam Dijkzigt, Rotterdam, The Netherlands.