Study design
This prospective case–control study was conducted from March 2020 to March 2022 at the otolaryngology department of Al-Zahraa Hospital, Al-Azhar University, Cairo, Egypt. The study was conducted under the Declaration of Helsinki and approved by the Local Ethics Committee of Al-Azhar University, Faculty of Medicine for Girls after pre-operative written informed consent from all children’s parents (IRB number 1625).