Funding for this research was provided by:
United States Agency for International Development (674-A-12-00029, 72067419CA00004)
Received: 29 December 2018
Accepted: 28 June 2019
First Online: 22 July 2019
Ethics approval and consent to participate
: Ethics approval for this study was granted by the Human Research Ethics Committee (Medical) of the University of the Witwatersrand, Johannesburg (protocol M160971). The study was a retrospective review of programmatic data and a waiver of informed consent was granted to retrospectively review these records.
: Not applicable.
: The authors declare they have no competing interests.