- Correspondence to Dr Professor Christopher Li-Hsian Chen, Department of Pharmacology, National University Health System, Clinical Research Centre, MD11, Level 5, #05-9, 10 Medical Drive, Singapore 117597;
- Received 19 December 2011
- Revised 13 February 2012
- Accepted 14 March 2012
- Published online 8 May 2012.
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.