Footnotes

• Twitter @samthebabydoc

• Contributors MSE conducted the data collection and analysis, and drafted the manuscript. NR and PS contributed to analysis and preparation.

• 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.