Footnotes

• Twitter @jklein_NCDchild, @adamoshadjipana

• Contributors JDK and ZB conceptualised and designed the study and drafted, reviewed and revised the manuscript. BK, MHE-S, AH and NT designed the study and drafted, reviewed and revised the manuscript. All authors approved the final manuscript as submitted 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; internally peer reviewed.

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