Received: 15 September 2020
Accepted: 22 April 2021
First Online: 1 June 2021
: A written parental consent was taken before operation in all cases. Owing to the retrospective nature of the study, an IRB number was not required, and the study was approved through expedited review by the scientific/ethical committee of the Pediatric Surgery department (Faculty of Medicine, Ain-Shams University).
: Patient identity did not appear in any part of the manuscript; therefore, consent for publication was not required.
: The authors declare that they have no competing interests.