- Correspondence to Dr Andrew Neill, Emergency Department, St Vincent's University Hospital, Elm Park, Dublin 4, Ireland;
- Received 4 October 2012
- Revised 10 December 2012
- Accepted 3 February 2013
- Published in print 1 May 2014.
- Published online 15 April 2014.
- Published first 19 February 2013.
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