Received: 19 October 2020
Accepted: 22 December 2020
First Online: 5 January 2021
Ethics approval and consent to participate
: All procedures performed in studies involving human participants 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.A written informed consent was waived by Mansoura University institutional review board (IRB) due to retrospective nature of the study.
: The participants in the study were informed and consented the possibility of research publication. Authors hereby transfer, assign, or otherwise convey all copyright ownership to the EJRNM in the event that such work is published in that journal.
: The authors declare that they have no conflict of interest.