Received: 16 April 2019
Accepted: 15 April 2020
First Online: 1 May 2020
Ethics approval and consent to participate
: Before the data collection, an ethical clearance was taken from the Institutional Review Board of Tribhuvan University, Institute of Medicine and formal permission was obtained from the school authorities. A written informed consent was taken from the students and their parents. They were also informed about the purpose of the study, their voluntariness in participation and no any foreseeable risk and harm in the study.
: Not applicable.
: The authors declare that they have no competing interests.