Elsayed, Ahmed
Elsayed, Adham
Article History
Received: 1 January 2019
Accepted: 22 April 2019
First Online: 8 May 2019
Ethics approval and consent to participate
: This study was ethically approved by Neurosurgery ethical review committee, Faculty of Medicine, Cairo University on 12th February, 2014. Informed written consent to participate in the study was obtained from participants.
: Not applicable.
: The authors declare that they have no competing interests.
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