Received: 7 November 2019
Accepted: 3 March 2020
First Online: 14 April 2020
Ethics approval and consent to participate
: The study protocol was approved by the Ethics Committees of the Tehran University of Medical Sciences (TUMS.REC.1395.25966). The trial is registered in the Iranian Registry of Clinical Trial (IRCT201408029568N9). Before participation in the study, written informed consent was obtained from each child’s primary guardian.
: Not Applicable.
: The authors declare that they have no competing interests.