Funding for this research was provided by:
National Health Laboratory Service Trust
Received: 17 December 2019
Accepted: 6 March 2020
First Online: 14 March 2020
Ethics approval and consent to participate
: The works has been approved by the Health Research Ethics Committee of Stellenbosch University (Reference number N14/06/065).
: The study does not contain any individual person’s data, therefore, consent for publication is not required.
: The authors have none to declare.