Article History
Received: 12 September 2019
Accepted: 10 February 2022
First Online: 21 February 2022
Declarations
:
: The study has received ethical clearance from the Biomedical Research Ethics Committee, University of KwaZulu-Natal (ethical clearance number 00003690). Informed consent is not applicable as this is a review study.
: Not applicable.
: The authors declare that they have no competing interests.