- Correspondence to Dr Ka-Fai Chung, Department of Psychiatry, University of Hong Kong, Hong Kong SAR, China;
- Received 26 January 2017
- Accepted 11 March 2017
- Published online 2 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.