Statistics from Altmetric.com
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.
Competing interests Over the past 3 years, NAR has received research grants from Nabi Biopharmaceuticals and been an unpaid consultant for Pfizer and Free & Clear. CC has no competing interests.