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Contributors As per the international committee of medical journal editors, I can confirm that each author met each of the following criteria: substantial contributions to the conception or design of the work; or the acquisition, analysis, or interpretation of data for the work; drafting the work or revising it critically for important intellectual content; final approval of the version to be published; agreement to be accountable for all aspects of the work in ensuring that questions related to the accuracy or integrity of any part of the work are appropriately investigated and resolved.
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 TH is the former president of the Royal College of Emergency Medicine.
Patient consent for publication Not required.
Provenance and peer review Not commissioned; externally peer reviewed.