Received: 29 October 2018
Accepted: 15 June 2020
First Online: 23 June 2020
Ethics approval and consent to participate
: All procedures performed in this study were approved by the research ethics committee of the University of KwaZulu-Natal and Centre for the AIDS Programme of Research in South Africa (CAPRISA). Written informed consent was obtained from all participants, and ethical approval for the original study was granted by the University of KwaZulu-Natal (E013/04), the University of Cape Town (025/2004), and the University of the Witwatersrand (M040202).
: Not applicable.
: The authors declare that they have no competing interests.