Footnotes

• Contributors Both authors identified the paper of interest. TRF wrote the first draft, which MV-M edited. Both authors added the verdict and approved the final version.

• 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.