Received: 6 January 2021
Accepted: 12 May 2021
First Online: 29 May 2021
: This study was approved by the ethics committee of Faculty of Medicine Beni-Suef University, (reference number is not available). Consent to participate in this research was obtained from the subjects’ parents before commencement of the study.
: Not applicable.
: The authors declare that they have no competing interests.