Dayasiri, M. B. K. C.
Jayamanne, S. F.
Jayasinghe, C. Y.
Article History
Received: 27 October 2017
Accepted: 7 August 2018
First Online: 18 August 2018
Ethics approval and consent to participate
: Written consent was obtained from parents of all participants of the study. The study was granted ethical approval from Ethical review committees of Faculties of Medicine, University of Kelaniya (P14/02/2012) and Rajarata university of Sri Lanka.
: Not applicable.
: The authors declare that they have no competing interests.
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