Kokkinos, Constantinos M. http://orcid.org/0000-0002-8303-3769
Kirpitsi, Eirini
Voulgaridou, Ioanna
Markos, Angelos
Article History
First Online: 22 June 2020
Compliance with Ethical Standards
: The study was approved by the Institute of Education Policy, a scientific and consulting body under the authority of the Greek Ministry of Education, Research and Religious Affairs. 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.
: Author A, Author B, Author C and Author D declare that they have no conflict of interest.
: Informed consent was obtained from all individual participants included in the study.