Funding for this research was provided by:
Health Services and Delivery Research Programme (15/137/01)
Received: 28 August 2019
Accepted: 23 April 2020
First Online: 5 June 2020
Ethics approval and consent to participate
: The study received ethical approval from National Research Ethics Services East of England - Cambridgeshire and Hertfordshire Research Ethics Committee by Proportionate Review and the Health Research Authority (approval issued 26th September 2017: REC reference: 17/EE/3057). Written consent was obtained from every participant.
: Not applicable.
: Ian Maidment was a member of the West Midlands NIHR RfPB committee from January 2014 to December 2018. Geoff Wong is Joint Deputy Chair of the National Institute for Health Research Health Technology Assessment Programme Prioritisation Committee A. Andrew Booth holds several NIHR Committee Memberships including the NIHR HS&DR Funding Committee, Systematic Reviews Programme Advisory Group and the Complex Reviews Advisory Group. He is also co-director of the NIHR HS&DR Evidence Synthesis Centre and a newly awarded NIHR PHR Evidence Synthesis Centre. There are no other competing interests.