Funding for this research was provided by:
International Atomic Energy Agency (RAF 6042)
Received: 3 January 2019
Accepted: 2 May 2019
First Online: 15 May 2019
Ethics approval and consent to participate
: The Senate Research Committee of the University of the Western Cape (ID NO: 15/5/5), South Africa and the Ethical Review Committee of the Ghana Health Service (ID NO: GHS-ERC: 01/07/13), Ghana, approved the study. Additional approval was obtained from the Municipal Education Directorate of the Ghana Education Service, and from the heads of participating schools while parents or legal guardians of children provided written informed consent. Also, every participating child gave verbal assent after explaining the study.
: Not applicable.
: The authors declare that they have no competing interests.
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