Statistics from Altmetric.com
Contributors TW conceived the idea and wrote the majority of the article. ED contributed to sections on haematological causes, vasculitic causes and mechanical causes. ML provided a comprehensive review of the article and expert analysis. All authors agreed the final version.
Competing interests None declared.
Provenance and peer review Commissioned; externally peer reviewed.
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.