Statistics from Altmetric.com
Contributors All authors contributed equally to the development and multiple revisions to the document.
Funding HC and KCL are supported in part by a Merit Award from the Department of Anaesthesiology and Pain Medicine at the University of Toronto.
Competing interests None declared.
Patient consent for publication Not required.
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.