Funding for this research was provided by:
Health Services Research Programme (P69339)
Received: 14 March 2020
Accepted: 28 December 2020
First Online: 25 January 2021
Ethics approval and consent to participate
: The study was reviewed and ethically approved by the Joint Research Compliance Office (JRCO; 18IC4906), Imperial College London, UK. Informed written consent was obtained from all participants, and no payment was given in exchange for participation.
: Not applicable.
: We declare no conflict(s) of interest associated with this research.