Salah, Norhan
Osman, Dalia Mostafa
Safwat, Rasha
Farag, Heba Mahmoud http://orcid.org/0000-0002-0064-3677
Article History
Received: 12 February 2022
Accepted: 9 April 2022
First Online: 4 May 2022
Declarations
:
: The study was approved by the ethical committee of the Ear, Nose and Throat department, Cairo University number 22/ 2019. Informed consent was obtained from the parents for their children participation in this research.
: Not applicable
: The authors declare that they have no competing interests.