- Correspondence to Dr Beverley C Millar, Northern Ireland Public Health Laboratory, Department of Bacteriology, Belfast City Hospital, Belfast BT9 7AD, UK;
- Received 27 July 2016
- Revision received 25 October 2016
- Accepted 27 October 2016
- Published in print 1 August 2017.
- Published online 2 August 2017.
- Published first 30 December 2016.
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