Funding for this research was provided by:
Government of the United Kingdom
Received: 19 December 2019
Accepted: 22 January 2021
First Online: 2 February 2021
Ethics approval and consent to participate
: The study received ethical approval from the North West—Greater Manchester East Research Ethics Committee (18/NW/0188). Written informed consent was obtained prior to participation.
: Not applicable.
: The authors declare that they have no competing interests.