Received: 2 August 2017
Accepted: 17 December 2018
First Online: 9 January 2019
Ethics approval and consent to participate
: UnorderedList removedDr. Mostafa Kotb (+ 2012)22118951Professor of NeurosurgeryHead of Ethical Committee, Department of Neurosurgery,Cairo UniversityUnorderedList removed
: All participants provided informed written consent for publication of their data included within the study.
: The authors declare that they have no competing interests.
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