Received: 3 December 2021
Accepted: 4 March 2022
First Online: 21 March 2022
: The study protocol ethics was approved by the committee of the Department of Pediatrics, Faculty of Medicine, Cairo University, and the tenets of the Helsinki declaration were adhered to. Informed consent was obtained from parents.
: Not applicable
: The authors have no conflicts of interest to declare that are relevant to the content of this article.