Received: 26 April 2017
Accepted: 8 May 2018
First Online: 21 May 2018
Ethics approval and consent to participate
: This study was approved by the Human Ethical committee, University of Aleppo (Syria). Written informed consent was taken from all the family members and legal guardians for patients under 18 before participation in the study.
: The authors declare that they have no competing interests.
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