Text and Data Mining valid from 2020-04-10
Received: 11 October 2019
Accepted: 23 March 2020
First Online: 10 April 2020
Ethics approval and consent to participate
: All participants were informed about the study and confidentiality protocols. Written informed consent was obtained from all the participants (Consent to participate was obtained from the parents/guardians of the minors). The Ethics Committee of Qazvin University of Medical Sciences confirmed the study (IR.QUMS.REC.1396120).
: Not applicable.
: The authors declare that they have no competing interests