Footnotes

• Twitter @laura_eburke, @GwentLiverUnit

• Collaborators UK-PBC audit Steering Committee.

• Contributors LB drafted the letter. All other authors reviewed and contributed to revisions of the draft and are members of the UK-PBC audit steering committee.

• 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.