Received: 17 March 2021
Accepted: 20 December 2021
First Online: 5 January 2022
: At first, a permission was obtained from the university to conduct the study and attend the schools. The participants were allowed to enter and leave the study at any time. Suitable conditions were provided for a proper understanding of questions and responses for the subjects. Written informed consent was obtained from the study participants and from the parents of minor participants. The study on which these data analyses are based was approved by the Ethical Board Committee of Shahid Beheshti University of Medical Sciences (IR.SBMU.PHNS.REC.1398.152). After the completion of the intervention, the control group was also trained through the slides used in the experimental group. All methods were performed in accordance with the relevant guidelines and regulations.
: Not applicable.
: The authors have no conflict of interests.