1 Department of Orthopaedic Surgery, University Medical Centre Utrecht, Postbus 85500, G 05.228, 3508 GA, Utrecht, The Netherlands. l.costa-2@umcutrecht.nl.
2 Department of Orthopaedic Surgery, University Medical Centre Utrecht, Postbus 85500, G 05.228, 3508 GA, Utrecht, The Netherlands.
3 Department of Imaging, University Medical Centre Utrecht, Utrecht, The Netherlands.
4 Department of Orthopaedic Surgery, University Medical Centre Utrecht, Postbus 85500, G 05.228, 3508 GA, Utrecht, The Netherlands. R.M.Castelein@umcutrecht.nl.