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Article History

Received: 19 November 2017

Accepted: 23 March 2018

First Online: 25 April 2018

Ethics approval and consent to participate

: We hereby declare that all experiments have been examined and approved by the appropriate ethics committee and have therefore been performed in accordance with the ethical standards laid down in the 1964 Declaration of Helsinki.Approved by the ethical committee of the Neurosurgery Department Cairo University 12/12/2015. All the participants in the study gave written informed consent to participate in any research work and publications.

: We declare that all patients involved in the study signed an informed consent approving that they agree to share their medical data in any research work and to be published.

: The authors declare that they have no competing interests.

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