Funding for this research was provided by:
World Health Organization
Received: 9 October 2017
Accepted: 11 April 2018
First Online: 18 April 2018
Ethics approval and consent to participate
: Ethical approval was given by the Ghana Health Service Ethics Review Committee (GHS-ERC-73/02/16). Consent was sought from the Ghana Education Service in the various districts, head teachers and parents. Assent was sought from the students before data collection.
: The authors declare that they have no competing interests.
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