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Contributors EGLS and FC are responsible for researching articles and constructing the letter. FA is responsible for revising and balancing the arguments made. JS is responsible for appraising the final content and approving the final draft for submission. EGLS submitted the 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; internally peer reviewed.
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