Masuka, Josiah Tatenda https://orcid.org/0000-0003-0702-7591
Khoza, Star
Article History
Received: 8 April 2019
Accepted: 13 August 2019
First Online: 27 August 2019
Ethics approval and consent to participate
: No ethical approval was required because the study used publicly available, anonymized data in accordance with the guideline 2 of CIOMS and WHO for epidemiological studies.
: Not applicable
: The authors declare that they have no competing interests.