Ahmed, Ahmed Nabil Abdelhamid http://orcid.org/0000-0003-3966-2135
Mohamed, Ahmed Adly
Elbegermy, Marwa Mohamed
Abdelghafar, Mohamed Ali
Teaima, Ahmed Abdelmoneim
Article History
Received: 21 May 2021
Accepted: 26 November 2021
First Online: 6 January 2022
Declarations
:
: The authors declare that this research has been approved by the institutional review board and the ethics committee board of the ENT department, Faculty of medicine, Ain Shams University (Cairo, Egypt). All procedures performed in this study, involving human participants, were in accordance with the ethical standards of the institutional and the national research committee of Egypt and with the 1964 Helsinki declaration and its later amendments (Reference number for the ethical approval was ASUENT19122017). An informed written consent was obtained from all participants' parents or guardians before being involved in this study.
: Not applicable.
: The authors declare that they have no competing interests.