Text and Data Mining valid from 2020-03-20
Received: 20 October 2019
Accepted: 4 March 2020
First Online: 20 March 2020
Ethics approval and consent to participate
: Ethics approval and a request for waiver of informed consent were obtained from the Stellenbosch University Health Research Ethics Committee (HREC Reference No: X19/03/007) and the University of Cape Town Human Research Ethics Committee (HREC Ref No: 631/2019).
: Not applicable.
: The authors declare that they have no competing interests.