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Article History

Received: 11 August 2020

Accepted: 28 January 2021

First Online: 25 February 2021

Ethics approval and consent to participate

: This study was approved by the surgery department and ethics committee of faculty of medicine, Menofia University. Reference number is not available. A written consent was obtained from a parent or guardian of the patients.

: Informed verbal as well as written consent for publication of the data have been obtained from the parents of the patients included in this study as per the institution’s rule.

: The authors declare that they have no competing interests.