Received: 10 July 2021
Accepted: 13 October 2021
First Online: 7 December 2021
: The nature of the study was discussed with each patient, and written informed consent was obtained from all parents before participating in the study. This study was approved by Ain Shams University Hospital Ethics Committee after a very clear statement that provided information on the following points: study rationale; participation in this study was completely free and voluntary; participation in the study had no direct benefit to him, although the data obtained could be used for the benefit of other patients; they may be withdrawn at any time without giving any justification and without affecting their care service; and the results of the study may be used for scientific publication but the identities of the patients would be completely secret.The committee’s reference number is R 107/ 2021.
: “Not applicable”.
: The authors declare that they have no competing interests.