First Online: 16 September 2019
Ethics approval and consent to participate
: Ethical approval was obtained through the Ethics Committee at the South African Medical Research Council and by approval for the research was granted by the Centers for Disease Control and Prevention, Atlanta. The resistance testing and analysis was approved by the Human Research Ethics Committee (Medical) at the University of the Witwatersrand, Johannesburg.
: Not applicable.
: The authors declare that they have no competing interests.