- Correspondence to Dr Paul Andrzejowski, Department of Surgery, Sheffield Teaching Hospitals NHS Foundation Trust, Northern General Hospital, Herries Road, Sheffield, South Yorkshire S5 7AT, UK;
- Received 25 August 2015
- Revised 31 January 2016
- Accepted 21 February 2016
- Published online 16 March 2016.
If you wish to reuse any or all of this article please use the link below which will take you to the Copyright Clearance Center’s RightsLink service. You will be able to get a quick price and instant permission to reuse the content in many different ways.