Sabaa, Mohamed Abd Elmottaleb http://orcid.org/0000-0002-9491-6161
El Batawi, Ahmed Mahmoud
Article History
Received: 3 April 2021
Accepted: 22 August 2021
First Online: 19 September 2021
Declarations
:
: All procedures performed in this study were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki Declaration and its later amendments or comparable ethical standards. All procedures performed in the study were in accordance with the ethical standards and approved by the ethical committee (Otolaryngology Department of Cairo University- ethical committee reference number is not available). Consent to participate is inapplicable for this retrospective study.
: Not applicable.
: The authors have no competing interest.