Received: 30 June 2021
Accepted: 21 December 2021
First Online: 6 January 2022
: This study was approved by Ethics Committee of Beni-Suef University, Faculty of medicine and the ethics code was FWA00015547 FMBSUREC\07062020. Also, written informed consent was obtained from the parent of the participating children.
: Not applicable.
: The authors declare that they have no conflict of interest.