Text and Data Mining valid from 2020-01-22
Received: 3 October 2019
Accepted: 24 December 2019
First Online: 22 January 2020
Ethics approval and consent to participate
: 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 Surgery Department (Faculty of Medicine, Ain-Shams University). All procedures performed in this study were in accordance with the ethical standards of the institutional and national research committee. Informed verbal consent was obtained from all individual participants included in the study.
: Not applicable
: The authors declare that they have no competing interests.