Funding for this research was provided by:
Hankuk University of Foreign Studies
Article History
First Online: 12 May 2020
Compliance with Ethical Standards
:
: The authors declare that they have no conflicts of interest.
: All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional research committee (Hankuk University of Foreign Studies) and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards.
: Informed consent was obtained from all individual participants included in the study. Only student surveys with parental consent and student assent were included in the study.