Waziri, Bala http://orcid.org/0000-0001-6291-6610
Dix-Peek, Therese
Dickens, Caroline
Duarte, Raquel
Naicker, Saraladevi
Funding for this research was provided by:
Astrazenaca research trust fund (ACZWAZ)
Article History
Received: 15 August 2017
Accepted: 22 January 2018
First Online: 7 February 2018
Ethics approval and consent to participate
: The study protocol was approved by the Health Research and Ethics committee (HREC) of the University of the Witwatersrand; clearance certificate number M141016. All participants gave written informed consent prior to enrolment.
: Not applicable
: The authors declare that they have no competing interests.
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