- Correspondence to Dr Joanna C Robson, Nuffield Department of Orthopaedics, Rheumatology and Musculoskeletal Science, University of Oxford, Nuffield Orthopaedic Centre, Windmill Road, Oxford OX3 7HE, UK;
- Received June 14, 2013
- Revised August 9, 2013
- Accepted September 20, 2013
- First published October 4, 2013.
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