Funding for this research was provided by:
Zayed University (R13055)
Received: 27 February 2018
Accepted: 12 November 2018
First Online: 21 November 2018
Ethics approval and consent to participate
: The study protocol was approved by the Zayed University Research Ethics Committee (ZU13–034-F). Written informed consent and verbal consent were obtained from parents and participants, respectively.
: Not applicable.
: The authors declare they have no competing interests.
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