- Correspondence to Nirmal James, Department of Emergency Medicine, Royal Gwent Hospital, Cardiff Road, Newport NP20 2UB, UK;
- Received 20 December 2015
- Revised 25 July 2016
- Accepted 2 February 2017
- Published in print 1 June 2017.
- Published online 24 May 2017.
- Published first 24 March 2017.
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.