- Correspondence to Christopher Harmston, Department of Colorectal Surgery, University Hospital Coventry and Warwickshire NHS Trust, Clifford Bridge Road, Coventry, Warwickshire CV2 2DX, UK;
- Received 31 December 2011
- Revised 1 November 2012
- Accepted 27 November 2012
- Published online 2 January 2013.
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