Article History
Received: 24 July 2018
Revised: 5 February 2019
Accepted: 7 February 2019
First Online: 15 February 2019
Compliance with ethical standards
:
: The study was approved by the Ethics Committee of the Saint Vincent De Paul Hospital and has therefore been performed in accordance with the ethical standards laid down in the 1964 Declaration of Helsinki and its later amendments. Parents of respondents were informed about the study via the school administration and the investigators; they gave their informed consent prior to inclusion of their children in the study and could opt out if they disagreed with their child<i>’</i>s participation. Participation in the study was fully voluntary and anonymous with no explicit incentives provided for participation.
: The authors declare that they have no conflict of interest.