Text and Data Mining valid from 2018-11-07
Received: 3 July 2018
Accepted: 25 October 2018
First Online: 7 November 2018
Ethics approval and consent to participate
: Ethical approval was obtained from the Ethics Committee, Colombo Medical Faculty. Informed written consent was obtained from all parents and students participating in the study. Student participation was anonymous and voluntary. Permission to conduct the research was obtained from the school principal of each school and the Zonal Director of Education, Homagama.
: Not applicable
: The authors declare that they have no competing interests.
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