Funding for this research was provided by:
United States Agency for International Development (674-A-12-00015)
Received: 5 May 2018
Accepted: 1 August 2018
First Online: 6 September 2018
Ethics approval and consent to participate
: Written informed consent was obtained from all study participants. Ethical approval was obtained from the Human Research Ethics Committee at the University of Witwatersrand, Johannesburg, South Africa (Reference number: M1611111) as well as the Limpopo Provincial Health Research Committee.
: Not applicable.
: The authors declare that they have no competing interests.
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