Funding for this research was provided by:
Wellcome Trust (099782)
Received: 23 November 2017
Accepted: 9 February 2018
First Online: 7 March 2018
Ethics approval and consent to participate
: The study was approved by the KEMRI Scientific Steering and Ethical Review Committees. The parents of the children gave informed written consent to participate in the study.
: This paper is published with the permission of the director of KEMRI.
: The authors declare that they have no competing interests.
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