Funding for this research was provided by:
National Institutes of Health (R01AI124413-01)
South African Medical Research Council
Received: 31 October 2017
Accepted: 3 April 2018
First Online: 11 April 2018
Ethics approval and consent to participate
: This study was approved by the Institutional Review Boards at Columbia University Medical Center and the Biomedical Research Ethics Committee at the University of KwaZulu-Natal in South Africa. Written informed consent was obtained from all patients in either isiZulu or English.
: Not applicable.
: The authors declare that they have no competing interests.
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