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Article History

Received: 17 March 2019

Accepted: 6 September 2019

First Online: 28 November 2019

Ethics approval and consent to participate

: A research committee approval has been granted for this study by the medical ethics committee, Faculty of Medicine, Zagazig university at 5/1/ 2012. Informed consent according to the criteria set by the local research ethics committee in our center obtained in writing before surgery. If consent could not be obtained because the patient was in a coma or young age (< 16 years), consent was obtained from the legal guardian.

: Informed consents were obtained for all patients and no personal data included in this study.

: The author declares that he/she has no competing interests.