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About the article
Published Online: 2018-06-13
Funding Source: University of Sri Jayewardenepura
Award identifier / Grant number: ASP/06/RE/MED/2014/19
The study was funded by university research grant from the University of Sri Jayewardenepura (ASP/06/RE/MED/2014/19).
Availability of data and materials: The datasets used and/or analyzed during the current study are available from the corresponding author on reasonable request.
Ethics approve and consent to participate: Ethical approval was granted by the Ethics Review Committee, Faculty of Medical Sciences, University of Sri Jayewardenepura (Reference no 80/14). Permission to carry out the study was obtained from the relevant school authorities. Informed written consent from the parents and each child’s assent were taken prior to start the data collection.
Consent for publication: All authors have approved the final manuscript and consented for publication.
Declaration of conflicting interests: The author(s) declared no conflicts of interest with respect to the research, authorship, and/or publication of this article.
Author contribution: HJM was involved in designing the study, collection of data, preparing the data base, statistical analysis of data, interpretation of data and writing the first draft of the manuscript. SWW was involved in designing the study, critical analysis of results, interpretation of data, manuscript writing and final proof reading before submission. CSEG was involved in designing the study, interpretation of data, manuscript writing and final proof reading before submission. AATDA was involved in designing the study, interpretation of data, manuscript writing and final proof reading before submission. JL was involved in designing the study, interpretation of data, critical analysis of results, manuscript writing, final proof reading before submission and supervision of progress of the study.