Received: 22 September 2019
Accepted: 23 March 2020
First Online: 29 May 2020
Change Date: 11 August 2020
Change Type: Correction
Change Details: An amendment to this paper has been published and can be accessed via the original article.
Ethics approval and consent to participate
: The ethical approval was obtained from the ethics committee of Tarbiat Modares University under the code IR.TMU.REC.1396.727 and was in accordance with the Helsinki Declaration. We invited all of the available students that had been approved for participation by their school principal, and their parents; informed them about research design, aim, objectives, as well as voluntariness, confidentiality and their rights. They then agreed to participate in the study by completing and returning the questionnaire. The parents/legal guardians completed the consent form on behalf of their children.
: Not applicable.
: The authors declare that they have no competing interests.