Received: 21 October 2019
Accepted: 5 August 2020
First Online: 12 August 2020
Ethics approval and consent to participate
: Permission to conduct the study was granted by the Biomedical Research Ethics Committee of the University of KwaZulu-Natal, South Africa (BE613/18) as well as the Medical Research Council of Zimbabwe (A/2352). Written informed consent was sought from all study participants.
: All participants consented to publication with anonymity.
: The authors declare that they have no competing interests.