- Correspondence to Dr Emma M Harding-Esch, HIV/STI Department, National Infection Service, Public Health England, London, UK;
- Received August 12, 2016
- Accepted August 18, 2016
- First published November 3, 2016.
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.