Received: 5 October 2021
Accepted: 10 December 2021
First Online: 6 January 2022
: The study protocol has been approved by the IRB committee of Mansoura Faculty of Medicine, Mansoura University, Egypt (MS.19.03.523). A written informed consent was signed by the parents of children participating in the study prior to the study.
: It was included in the written consent to participate in the study.
: The authors declare that they have no competing interests.