Funding for this research was provided by:
Ministry of Science and Technology, Taiwan (MOST 104-2629-S-214-001)
Article History
First Online: 9 May 2019
Compliance with Ethical Standards
: This study received ethical approval from the National Cheng Kung University Human Research Ethics Committee (No. 104–303-2). All students and their parents/guardians were provided with an invitation letter and were fully informed of the purpose, methodology, and significance of the study. Written consent from students and their parents/guardians was obtained. They were informed that they could withdraw at any stage without adverse personal consequences.
: The authors declare that they have no conflict of interest.