- Correspondence to Sajjad M Athar, Department of Orthopaedics, Queen’s Hospital, Belvedere Road, Burton-on-Trent, Staffordshire DE13 0RB, UK;
- Received 19 March 2017
- Revised 5 June 2017
- Accepted 13 June 2017
- Published online 5 September 2017.
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