Funding for this research was provided by:
Health Technology Assessment Programme (16/85/01)
Received: 1 October 2020
Accepted: 23 June 2021
First Online: 6 July 2021
: Ethics approval was granted by South Central Oxford B Research Ethics Committee on 22 May 2018 (REC reference 18/SC/0181, IRAS project ID: 229293). Interview participants provided verbal informed consent before taking part in the phone interview: obtaining written consent can be a barrier to participation in phone interviews and verbal consent was deem appropriate by the ethics committee named above. Participants consented to publication of anonymised quotes from their interviews in papers and reports.
: Not applicable.
: The authors declare that they have no competing interests.