Footnotes

• Twitter @SiwanTG, @DrMattChoy, @AngadDhillon

• Correction notice This article has been corrected since it published Online First. A supplementary file has been added.

• Contributors ST-G: manuscript planning, writing, review, responsible for overall content. MC: manuscript editing and video editing. ASD: manuscript writing, editing and submission.

• Funding The authors have not declared a specific grant for this research from any funding agency in the public, commercial or not-for-profit sectors.

• Competing interests None declared.

• Provenance and peer review Not commissioned; externally peer reviewed.