Funding for this research was provided by:
Wellcome Trust (102975, 100542, 084633, and 077092.)
Received: 29 March 2019
Accepted: 15 August 2019
First Online: 30 August 2019
Ethics approval and consent to participate
: The Kenya Medical Research Institute Scientific and Ethics Review Unit (SERU) approved the study. A written informed consent was obtained from participant’s parent or guardian.
: Not applicable.
: The authors declare that they have no competing interest.