Footnotes

• Twitter @MichelleM_Mello

• Contributors All authors had substantial contributions to design of work, drafted the work, made final approval and agreed to be accountable for all aspects of the work.

• 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 Not commissioned; externally peer reviewed.

• Data availability statement There are no data in this work.