Statistics from Altmetric.com
Contributors RT: drafted the Picket section. RT and CMH: drafted the commentary; revised and approved the final version.
Funding Funding was provided by the UK National Institute for Health Research Health Technology Assessment Programme. The funder provided advice and support but no role in study design, data collection and analysis, and writing of the report.
Competing interests None declared.
Provenance and peer review Not commissioned; internally peer reviewed.
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