Article History
Received: 11 October 2021
Accepted: 29 November 2021
First Online: 8 December 2021
Declarations
:
: Obtained from Ain Shams University, Faculty of Medicine, Research Ethics Board on 22 December 2014. Written informed consent was obtained from the parents of each child enrolled in the study.
: Not applicable.
: The authors declare that they have no competing interests.