Received: 16 June 2020
Accepted: 18 April 2021
First Online: 29 April 2021
: All participants had signed consent to participate.
: This observational study was given approval by the Research Ethics Committee (REC) of Neurosurgery Department, Benha Faculty of Medicine, Benha University, on 12 March 2017 (the reference number is not applicable). A written informed consent was obtained from each patient after explaining all the steps of this study. All procedures performed involving human participants were in accordance with the ethical standards of the institutional and<i>/</i>or national research committee and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards.
: The authors declare that they have no conflict of interest.