Funding for this research was provided by:
Deanship of Research, at Jordan University of Science and Technology, Irbid 22110, Jordan (269-2015)
Article History
Received: 24 April 2019
Accepted: 23 October 2019
First Online: 15 November 2019
Compliance with ethical standards
:
: The authors declare that they have no conflict of interest.
: All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards.
: The study protocol was approved by the Institutional Review Board (IRB), Jordan University of Science and Technology, Irbid, Jordan (IRB # 269/2015). Proper permissions were obtained from the Ministry of Education, Jordan. Prior written consent explaining objectives of the study was obtained from parents/guardians for their children to participate. Trial registration: ClinicalTrials.gov Identifier: NCT03526315 ‘retrospectively registered’.
: Informed consent was obtained from all individual participants included in the study.