Funding for this research was provided by:
Health Protection Scotland (NA)
Received: 24 January 2020
Accepted: 23 June 2020
First Online: 2 July 2020
Ethics approval and consent to participate
: The methodology section provides details of ethical approval processes. Approval for the study was granted by the Glasgow Caledonian University School of Health & Life Sciences Ethics Committee (HLS/NCH/17/020).
: Not applicable.
: The authors declare that they have no competing interests.