Text and Data Mining valid from 2020-03-18
Received: 12 November 2019
Accepted: 9 March 2020
First Online: 18 March 2020
Ethics approval and consent to participate
: The study was reviewed and approved by the Scientific Ethical Review Unit (<b>SERU No. 3284</b>) Committee of the Kenya Medical Research Institute (KEMRI). Permission to participate in the study was sought from parents/ guardians of all study participants who gave informed written consent.
: The authors declare that they have no competing interests.