Footnotes

• Contributors CKS-M conceptualised and designed the commentary, drafted the initial manuscript and reviewed and revised the manuscript. CC contributed to the conceptualisation and design of the commentary, and critically reviewed and revised the manuscript for important intellectual content. All authors approved the final manuscript as submitted and agree 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.

• Provenance and peer review Commissioned; internally peer reviewed.

• Patient consent for publication Not required.