Funding for this research was provided by:
King Abdulaziz University (G:394-165-1439)
Text and Data Mining valid from 2020-02-13
Received: 18 December 2019
Accepted: 9 February 2020
First Online: 13 February 2020
Ethics approval and consent to participate
: Ethical approval was obtained from the ethics committee of KAUFD (066–16) for this study. In addition, written informed consent was obtained from all participants. Parents received an Arabic consent and a letter explaining the aim, design, and methodology of the study.
: The authors declare that they have no competing interests.