- Correspondence to Dr Dafydd Loughran, Department of Surgery, Royal Glamorgan Hospital, Llantrisant, Rhondda Cynon Taf CF72 8XR, UK;
- Received 30 November 2013
- Revised 9 April 2014
- Accepted 22 August 2014
- Published in print 1 February 2015.
- Published online 20 January 2015.
- Published first 9 September 2014.
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