Funding for this research was provided by:
Tehran University of Medical Sciences (IR.TUMS.REC.1396.4433)
Received: 26 February 2019
Accepted: 11 February 2020
First Online: 14 February 2020
Ethics approval and consent to participate
: The study was approved by the Research Ethics Committee of Tehran University of Medical Sciences (decree number = IR.TUMS.REC.1396.4433). Furthermore, authorities of the Department of Education in Karaj agreed to cooperate in the study. The participants were all informed of the aim and method of the research, voluntary nature of participation and confidentiality of information. They signed the consent before participation and gave the permission to audio-record the interviews in a private room.
: Not applicable.
: The authors declare that they have no competing interests.