Footnotes

• 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.

• Patient consent for publication Not required.

• Provenance and peer review Commissioned; internally peer reviewed.

• Data availability statement Data sharing not applicable as no data sets generated and/or analysed for this study. No data are available. Commentary therefore contains no data.