Funding for this research was provided by:
Medical Research Council (RG46450)
Innovative Medicines Initiative 2 Joint Undertaking (777394)
Received: 4 November 2020
Accepted: 3 February 2021
First Online: 16 February 2021
Ethics approval and consent to participate
: Ethical approval for this study was obtained from the UCL Research Ethics Committee (reference 7475/002), and all participants gave their online consent to participate prior to completing the study.
: Not applicable.
: The authors declare that they have no competing interests.