Received: 7 May 2021
Accepted: 2 November 2021
First Online: 14 November 2021
: This study was approved by the Ethics Committee of Beni-Suef University, Faculty of Medicine, and the ethics code was FWA00015574 FMBSUREC/2032021. 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.