Funding for this research was provided by:
National Research Foundation (467209)
South African Medical Research Council (415918)
University of Cape Town (436464)
National Health Laboratory Services South Africa (94484)
Article History
Received: 11 June 2020
Accepted: 31 August 2020
First Online: 4 September 2020
Ethics approval and consent to participate
: Not Applicable.
: Not Applicable.
: The authors declare that they have no competing interests.