Statistics from Altmetric.com
Sources of funding National Health and Medical Research Council and Australian Rotary Health.
▸ References are published online only. To view please visit the journal online (http://dx.doi.org/10.1136/eb-2013-101515).
Competing interests None.
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.