Received: 4 November 2020
Accepted: 9 February 2021
First Online: 18 February 2021
Ethics approval and consent to participate
: The performed study’s protocol was following the principles of the declaration of Helsinki and the Nuremberg Code and approved by the Ethics Committee of Tehran University of Medical Sciences. The project approval number is IR.TUMS.MEDICINE.REC.1396.3662. An oral and written informed consent was obtained from the parents/guardians of the minors included in this study.
: Not applicable.
: The authors have declared no conflict of interest.