Footnotes

• Contributors CLC contributed to the conception of idea, write-up, review and finalisation of the manuscript. ON contributed to the review and edits of the manuscript. HSL contributed to the conception of idea, review and edits of the manuscript.

• 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 and public involvement Patients and/or the public were not involved in the design, or conduct, or reporting, or dissemination plans of this research.

• Provenance and peer review Not commissioned; externally peer reviewed.