Funding for this research was provided by:
Grand Challenges Canada (0087-04)
Received: 26 May 2017
Accepted: 16 April 2018
First Online: 23 April 2018
Ethics approval and consent to participate
: The study was approved by the Medical Research Council of Zimbabwe and by the Health Research Ethics Committee at Stellenbosch University in line with the ethical principles stated by the Helsinki Declaration. Consent was sought in written form from all participants.
: All participants gave written consent to publish all data reported in this and other publications arising from study.
: The authors declare that they have no competing interests except for DC who is supported through the DELTAS Africa Initiative [DEL-15-01]. The DELTAS Africa Initiative is an independent funding scheme of the African Academy of Sciences (AAS)‘s Alliance for Accelerating Excellence in Science in Africa (AESA) and supported by the New Partnership for Africa’s Development Planning and Coordinating Agency (NEPAD Agency) with funding from the Wellcome Trust [DEL-15-01] and the UK government. The views expressed in this publication are those of the author(s) and not necessarily those of AAS, NEPAD Agency, WellcomeTrust or the UK government.
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