Statistics from Altmetric.com
Contributors KCL and BL contributed equally to the conception, design, drafting and revision of the article and approved the final version of the article to be published. BL will be responsible for the overall content as guarantor.
Competing interests None.
Patient consent Obtained.
Provenance and peer review Not commissioned; internally 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.