Received: 17 April 2020
Accepted: 16 July 2020
First Online: 24 July 2020
Ethics approval and consent to participate
: All procedures followed were in accordance with the ethical standards of the responsible committee on human experimentation (Institutional Review Board (IRB)” of Alexandria General Hospital on 14<sup>th</sup> February 2017) and with the Helsinki Declaration of 1964 and later versions. The committee’s reference number is unavailable (not applicable). No consent was obtained from the patients since it was a retrospective study.
: All patients included in this research gave written informed consent to publish the data contained within this study.
: The authors declare that they have no competing interests.