Funding for this research was provided by:
Konkuk University (2016A0190199)
First Online: 7 October 2019
Compliance with ethical standards
: The authors declare that they have no conflict of interest.
: This study was carried out under the approval of the instructors in charge of the target courses. A survey was administered to their participants after explicitly explaining its purpose. The participants were clearly informed that their participation was on a totally voluntary basis and they would not be disadvantaged based on their responses. The participants were asked to respond to the survey items anonymously if they decided to participate in the study.
: Informed consent was obtained from all individual participants included in the study.