Funding for this research was provided by:
Text and Data Mining valid from 2020-03-12
Received: 4 March 2019
Accepted: 24 February 2020
First Online: 12 March 2020
Ethics approval and consent to participate
: Ethical approval was obtained from the University of KwaZulu-Natal Biomedical Research Ethics Committee (BFC 482/15). All participants provided written informed consent.
: Not applicable.
: The authors declare that they have no competing interests.