Received: 16 July 2018
Accepted: 16 April 2019
First Online: 14 May 2019
Ethics approval and consent to participate
: Institutional Review Committee of Shi-Gan International College of Science and Technology (SICOST), Kathmandu, approved this research. Written consent is not feasible for all subjects in Nepalese context since illiteracy is comparatively higher. Thus verbal consent was obtained from parents/guardians on the behalf of their children, as approved by ethical review committee, to omit the selection bias.
: Not applicable
: The authors declare that they have no competing interests.
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