Text and Data Mining valid from 2018-10-25
Received: 24 August 2018
Accepted: 30 September 2018
First Online: 25 October 2018
Ethics approval and consent to participate
: There was ethical committee approval from Ain Shams University Hospitals to do this work (the number is not available).
: There was a written informed consent from parents or legal guardians to participate their children in the study.Consent was taken from parents for the publication of personal data of their children.
: The authors declare that they have no competing interests.
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