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Article History

Received: 19 November 2017

Accepted: 12 August 2018

First Online: 28 August 2018

Ethics approval and consent to participate

: The study was approved by the Research Ethical Committees in the Faculty of Medicine, Cairo University (Feb 2015). All patients signed a written consent before the surgical operation indicating their acceptance to use their specimens in future research.

: Not applicable.

: The authors declare that they have no competing interests.

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