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Article History

Received: 12 March 2021

Accepted: 6 October 2021

First Online: 30 October 2021

Declarations

:

: Not applicable.

: The authors declare that they have no competing interests.

: All procedures performed in this study were in accordance with the ethical standards of the research committee of ENT department, Cairo University, Egypt.Reference number is not available.Informed written consent to participate in the study was provided by all participants’ parent or legal guardian in the case of children under 16 years old.