- Correspondence to Dr Pak-Leung Ho, Department of Microbiology, The University of Hong Kong, Queen Mary Hospital, Pokfulam Road, Pokfulam, Hong Kong, China;
- Received January 9, 2017
- Revised February 24, 2017
- Accepted March 11, 2017
- First published March 30, 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.