- Correspondence to Dr Keerthi Mohan, National Infection Service, Public Health England, London NW9 5EQ, UK;
- Received 7 November 2016
- Revised 1 April 2017
- Accepted 18 April 2017
- Published online 10 May 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.