Funding for this research was provided by:
National Key Research and Development Program of China (2019YFA09006000)
Postdoctoral Research Foundation of China (2018M633216)
National Natural Science Foundation of China (81772737)
Natural Science Foundation of Guangdong Province (2017B030301015)
Shenzhen Municipal Government of China (JCYJ20170413161749433, JSGG20160301161836370)
Sanming Project of Shenzhen Health and Family Planning Commission (SZSM201412018, SZSM201512037)
high level university’s medical discipline construction (2016031638)
Article History
Received: 26 November 2019
Revised: 2 March 2020
Accepted: 9 March 2020
First Online: 26 March 2020
Compliance with ethical standards
:
: The authors have declared that no conflict of interest exists.