Received: 2 August 2020
Accepted: 13 April 2021
First Online: 17 April 2021
: This study received the necessary approval from the research ethics committee of the University of the Western Cape (13/9/16). Written informed consent was obtained from all participants included in the study. Consent to participate was obtained from the parents/guardians of the minors included in this study.
: Not applicable.
: The authors declare that they have no competing interests.