Received: 3 August 2018
Accepted: 6 January 2019
First Online: 25 January 2019
Ethics approval and consent to participate
: A written consents were obtained for all patients ( from the patient and from the parent when age below 16 years old ), and the study approved by Zagazig university institutional review board (Zu-IRB) on 15/3/ 2013.
: A written consents for publication from the patients and from parents when the age below 16 years old were attained.
: The authors declare that they have no competing interests.
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