Funding for this research was provided by:
Innovation Research Grant Program for 8-year-system Medical Students at Zhejiang University (No. 119000-5405A1)
Article History
Received: 21 March 2019
Accepted: 14 October 2019
First Online: 14 November 2019
Ethics approval and consent to participate
: Not applicable.
: Not applicable.
: The authors declare that they have no competing interests.