Statistics from Altmetric.com
Contributors BRW and EPW-S researched data for the article and drafted the article. NY revised the article.
Funding Supported by Singapore National Medical Research Council (IRG 10nov086 and CSA/047/2012 to NY).
Competing interests None declared.
Patient consent Obtained.
Provenance and peer review Not commissioned; externally peer reviewed. This paper was reviewed by Ashwin Pinto, Southampton, UK, and John Winer, Birmingham, UK.
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.