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Authors
Farid, Ashraf Mohamed https://orcid.org/0000-0002-8891-5867
Elkholy, Ahmed Rizk
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Article History
Received: 29 January 2019
Accepted: 1 August 2019
First Online: 7 August 2019
Ethics approval and consent to participate
: Approved by the research ethics committee of faculty of medicine at Tanta University (reference number: 32806 obtained on 26 December 2018). Consent for participation was not applicable as this is a retrospective study, so the ethics committee waived the consent to participate.
: Not applicable.
: The authors declare that they have no competing interests.
