Funding for this research was provided by:
Department of Health, Northern Ireland (EAT/5332/19)
Article History
Received: 2 June 2020
Accepted: 20 December 2020
First Online: 4 January 2021
Ethics approval and consent to participate
: Not applicable.
: Not applicable: no details of any individuals are reported within the paper.
: The authors declare that they have no competing interests.