Text and Data Mining valid from 2019-04-25
Received: 22 October 2018
Accepted: 1 April 2019
First Online: 25 April 2019
Ethics approval and consent to participate
: The research was approved by Wamakko Local Government Education authority. Headmasters obtained informed consent from parents/guardians of the pupils after explaining the purpose and procedure of the study. Pupils were not forced to participate and were free to drop at any stage of the study.
: Not applicable.
: The authors declare that they have no competing interests.
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