Funding for this research was provided by:
Guangxi Natural Science Foundation (2018GXNSFAA281256)
Innovation Project of Guangxi Graduate Education (YCBZ2019045)
Chen Xiaoping foundation for the development of science and technology of Hubei province (CXPJJH1 1900003-17)
Guangxi Health and Health Committee Project (Z20190762)
the Education Foundation of Guangxi (2017KY0117)
International Communication of Guangxi Medical University Graduate Education (.)
Article History
Received: 12 December 2019
Accepted: 17 March 2020
First Online: 30 March 2020
Ethics approval and consent to participate
: Not applicable.
: Not applicable.
: The authors declare that they have no competing interests.