Kollios, Konstantinos
Nika, Thomaitsa http://orcid.org/0000-0003-1489-8029
Kotsis, Vasilios
Chrysaidou, Katerina
Antza, Christina
Stabouli, Stella
Article History
Received: 2 November 2019
Revised: 13 February 2020
Accepted: 17 February 2020
First Online: 25 February 2020
Compliance with ethical standards
:
: The authors declare that they have no conflict of interest.
: All procedures in the study were in accordance with the ethical standards of the Greek Ministry of National Education, the National Educational Institute, and the Ethics Committee of Aristotle University of Thessaloniki, which approved the study protocol (65104/Γ7/15-05-2013).
: Informed consent was obtained from all individual participants included in the study and their parents or legal guardians.