Funding for this research was provided by:
Research for Patient Benefit Programme (PB-PG-0317-20024)
Received: 1 February 2020
Accepted: 27 February 2020
First Online: 20 April 2020
Ethics approval and consent to participate
: Informed consent will be obtained from all participants. The study received NHS ethics approval on 28 March 2019 from the London–Surrey Borders Research Ethics Committee (REC reference 18/LO/2070).
: Not applicable.
: The authors declare that they have no competing interests.