Funding for this research was provided by:
the 2017 Liaoning Distinguished Professor (Grant number 9)
2017 Liaoning Bai Qian Wan Talents Program (Grant number 11)
the 2018 Medical Education Project of China Medical University (YDJK2018039)
the Social Science Promotion Program of China Medical University (3110118070)
Received: 27 February 2020
Accepted: 8 December 2020
First Online: 6 January 2021
Ethics approval and consent to participate
: Ethics approval for the investigation was granted by the Bioethics Advisory Commission of China Medical University. Written informed consent was obtained from each of the participants. The anonymity of participants was guaranteed and all of students voluntarily participated in the study.
: Not applicable.
: None declared.