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Article History

Received: 1 June 2018

Accepted: 21 February 2019

First Online: 1 April 2019

Ethics approval and consent to participate

: The study was approved by the Ethical Review Committee of the Ghana Health Service and the Senate Research Committee of the University of the Western Cape. Approval was also obtained from the Municipal Education Directorate of the Ghana Education Service as well as from the heads of all participating schools. Written informed consent was obtained from parents/legal guardians of all participating children. Verbal assent was obtained from every participating child.

: Not applicable.

: The authors declare no competing interest.

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