- Correspondence to: Professor G A C Murrell Orthopaedic Research Institute, University of New South Wales, The St George Hospital, Level 2, 4-10 South Street, Kogarah, Sydney, New South Wales 2217, Australia;
- Accepted 14 December 2006
- Published in print 1 April 2007.
- Published online 30 March 2007.
- Published first 8 February 2007.
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