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Contributors This article was commissioned as part of the ADC Equipped series. AR and JR worked closely together on the planning, design, drafting and final approval of this article.
Funding The authors did not receive any funding for this work. The quality improvement project outlined in box 2 is supported by The Health Foundation's SHINE programme (UK charity number: 286967).
Competing interests None.
Provenance and peer review Commissioned; internally peer reviewed.
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