Received: 14 July 2019
Accepted: 26 February 2020
First Online: 6 April 2020
Ethics approval and consent to participate
: Ethical approval was obtained from the Institutional Review Board (IRB) at King Saud University (17/0064/IRB). The research procedures were conducted in accordance with the principles expressed in the Declaration of Helsinki. Written informed consent was obtained from all parents. Approval for conducting this research in schools was obtained from the directorate of schools at the Ministry of Education and the principals of the selected schools.
: Not applicable.
: The authors declare that they have no competing interests.