Footnotes

• Twitter @bethosmond

• Correction notice This article has been corrected since it first published. The provenance and peer review statement has been included.

• Contributors EO and CC contributed to the manuscript and the revision process.

• 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.