Funding for this research was provided by:
Jiangsu Province Graduate Education Teaching Reform Research and Practice (JGLX14071)
Jiangsu Key Project of Graduate Education Reform (JGZD18_012)
Graduate Education Teaching Reform Project of Nanjing Medical University (SPOCZD201902)
Received: 16 May 2018
Accepted: 25 July 2019
First Online: 1 August 2019
Ethics approval and consent to participate
: As only descriptive data was collected, and no intervention were performed, the study was regarded as exempt from formal ethical approval according to the Medical Faculty of Nanjing Medical University. Special measures were undertaken to guarantee the anonymity of the participants. Written informed consent to participate in the research was obtained from all participants.
: Not applicable.
: The authors declare that they have no competing interests.