Funding for this research was provided by:
National Natural Science Foundation of China (81673990,81822050)
The first round of three year action plan to promote clinical skills and clinical innovation in municipal hospitals (16CR1017A)
Received: 29 January 2019
Accepted: 30 May 2019
First Online: 24 June 2019
Ethics approval and consent to participate
: The ethics committee of the Shanghai University of TCM approved the study (approval number 2016LCSY097). Each participating center has conducted ethical filing and has the ethical approval of the main central hospital. All volunteers signed the informed consent form before the trial.
: Not applicable.
: The authors declare that they have no competing interests.