Funding for this research was provided by:
Carnegie Corporation of New York (Grant No--B 8606.R02)
Deutscher Akademischer Austauschdienst (Grant No: 107768/Z/15/Z)
South African Medical Research Council
SIDA (Grant No:54100113)
Received: 10 August 2020
Accepted: 19 July 2021
First Online: 12 August 2021
Change Date: 27 September 2021
Change Type: Correction
Change Details: A Correction to this paper has been published:
Change Details: https://doi.org/10.1186/S12889-021-11722-8
: Ethical approval for this study was sought from the University Of Witwatersrand Faculty Of Health Science Human Ethics Committee (reference number: M180249) as well as the Ethics Review Board of the Oyo State Ministry of Health, Oyo State, Nigeria (reference number: AD/13/479/762). Both ethics committees approved the study. Permission to conduct the study was also obtained from appropriate local community authorities and written informed consent was obtained from all participants. The principles of beneficence, justice & non-maleficence were observed.
: Not applicable.
: The authors declare that they have no competing interests.