Text and Data Mining valid from 2019-03-12
Received: 24 May 2018
Accepted: 5 March 2019
First Online: 12 March 2019
Ethics approval and consent to participate
: Permission to conduct the study was granted by the Biomedical Ethics Research Committee of King Abdulaziz University. Detailed written informed consent was obtained from the parents/caregivers prior to inclusion.
: Not applicable.
: The authors declare that they have no competing interests.
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