Funding for this research was provided by:
2017 The Students Oversea Research Grant, Kyoto University (Not applicable)
Received: 11 December 2018
Accepted: 20 December 2019
First Online: 30 December 2019
Ethics approval and consent to participate
: This study was approved by the Kyoto University Graduate School and Faculty of Medicine Ethics Committee (R1327–1) and the Research Ethics Committee of National Taiwan University Hospital (201601074RIND).Prior to the survey, eligible students were asked to grant written informed consent and provide written informed consent from their parents/guardians to participate in the survey. All participants and their guardians received information about the study purpose, its strict confidentiality and the voluntary nature of their participation.
: Not applicable.
: The authors declare that they have no competing interests.