Statistics from Altmetric.com
Contributors CC, THB and AB: conception and drafting of the article, AB: drafting of the article, revision of the intellectual content, final approval.
Competing interests None.
Provenance and peer review Not 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.