Article History
Received: 8 February 2020
Accepted: 18 August 2020
First Online: 5 September 2020
Compliance with ethical standards
:
: The authors declare that they have no conflict of interest.
: The present study was approved by both Ethics Committees of the Lebanese University (#76/2017) and Saint-Joseph University of Beirut (#USJ-2017–143).
: All parents or guardians of the participating children were informed about the study before their enrolment and they gave voluntary consent.