Funding for this research was provided by:
Medical Research Council (MR/N013468/1)
Received: 8 October 2021
Accepted: 29 January 2022
First Online: 10 February 2022
: The study was approved by the University of Oxford Medical Sciences Interdivisional Research Ethics Committee [reference R72039/RE001]. Verbal informed consent was obtained from all participants before any study-specific activities were undertaken.
: Not applicable
: KM and SH contribute to a Pilot and Feasibility Studies working group. The other authors declare that they have no competing interests.