Received: 25 March 2020
Accepted: 13 July 2020
First Online: 7 October 2020
: There is no conflict of interest.
: The current work was conducted in accordance to the guidelines of ethical committee of Faculty of Medicine Beni-Suef University after receiving the committee’s approval. Approval No: .FMBSUREC/03112019/Mahmoud. The parents of the participating children or one of them was informed about the objectives of the study, and written consent was taken.
: Not applicable.