Received: 18 November 2017
Accepted: 11 December 2018
First Online: 29 December 2018
Ethics approval and consent to participate
: The authors obtained permission to conduct this study from the Research Ethics Committee of the Faculty of Medicine, Menoufia University at 28/10/2018. An informed consent was obtained from all the patients studied.
: Not applicable.
: The authors declare that they have no competing interests.
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