Received: 16 February 2018
Accepted: 6 June 2018
First Online: 3 July 2018
Ethics approval and consent to participate
: The project proposal received ethical approval from the Hospital Ethics Committee.
: Written informed consent was obtained from the patients’ parents for publication of this study. A copy of the written consents is available for review by the Editor-in Chief of this journal.
: The authors declare that they have no competing interests.
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