Funding for this research was provided by:
National Institutes of Health (R24TW008905)
Received: 22 February 2018
Accepted: 31 October 2018
First Online: 14 November 2018
Ethics approval and consent to participate
: Ethical clearance for the study was granted by Parirenyatwa Hospital and College of Health Sciences Joint Research Ethics Committee (ref. JREC/183/14) and the Harare Central Hospital Ethics Committee (ref. 020514/24). The research was registered with the Medical Research Council of Zimbabwe (ref. B/684). All participants provided signed written consent prior to participation.
: Not applicable.
: The authors declare that they have no competing interests.
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