Razek, Ahmed Abdel Khalek Abdel http://orcid.org/0000-0002-9613-5932
Elfar, Elsayed
Abubacker, Shefeek
Article History
First Online: 6 April 2019
Compliance with ethical standards
:
: The authors declare that they have no conflicts of interest.
: 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.
: Informed consent was waived because of the retrospective nature of this study.