Footnotes

• AR and IAH contributed equally.

• Contributors AR and IAH appraised the journal article critically, drafted the manuscript and approved the final version. AR and IAH are Joint first authors.

• 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 Not commissioned; internally peer reviewed.

• Patient consent for publication Not required.