Received: 23 December 2018
Accepted: 22 August 2019
First Online: 29 August 2019
Ethics approval and consent to participate
: This study had been approved by the ethics committee of the pharmaceutical sciences branch of Islamic Azad University, Tehran, Iran. Written informed consent was obtained from the parents to take part in this study and for possible publication. A copy of the written consent is available for review by the Editor of this journal.
: The authors declare that they have no competing interests.