Funding for this research was provided by:
The study was funded by the Undergraduate Student Innovation and Entrepreneurship Training Program of Fujian Medical University (grant no. C18155)
Received: 5 August 2019
Accepted: 24 January 2020
First Online: 31 January 2020
Ethics approval and consent to participate
: Before survey, all participants were obtained by verbal informed consent. The research was approved by the ethical committee of Fujian Medical University (M20170302).
: Not applicable.
: The authors declare that they have no competing interests.