Footnotes

• Twitter @bethany_gill1

• Contributors AB was the guarantor and conceived and developed the idea, performed the literature review and wrote the manuscript. BG contributed to writing and editing the manuscript. Both authors accept the final version.

• Funding This article is supported by the National Institute for Health Research Applied Research Collaboration North West Coast (ARC NWC). The views expressed in this publication are those of the author(s) and not necessarily those of the National Institute for Health Research or the Department of Health and Social Care.

• Competing interests None declared.

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