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Contributors LD and AJN jointly conceived this commentary. LD wrote the first draft and then both authors undertook several rounds of critical revision. Both authors have read and approved the final submitted version.
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.
Patient consent for publication Not required.
Provenance and peer review Commissioned; internally peer reviewed.