Hassan, Osama Mohamed http://orcid.org/0000-0003-4868-9882
Mansour, Hisham
Metwaly, Osama
Salah, Mohamed
Article History
Received: 29 January 2021
Accepted: 19 April 2021
First Online: 6 May 2021
Declarations
:
: All procedures performed in this study were in accordance with the ethical standards of the research committee of ENT Department, Cairo University, Egypt, on 2017. Ethical committee approval of Otorhinolaryngology, Head and Neck Surgery Department, at Cairo University, Egypt in 2017 was granted before embarking on the study. Reference number is not available.Informed written consent to participate in the study was provided by all participants or their legal guardian.
: Not applicable.
: All authors declare that they have no competing interests.