Footnotes

• Twitter @SimEdRBHSC

• Contributors All were involved in patient care. All were involved in manuscript design, serial drafts and approved final copy. SW provided expert external advice on patient management and reviewed final 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.

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