Funding for this research was provided by:
the National Natural Science Foundation of China (61965001, 11864001)
the Ningxia Province Key Research and Development Program (2018BEE03015)
Natural Science Foundation of Ningxia Province (2018AAC03118, 2019AAC03103)
he Ningxia first-class discipline and scientific research projects (NXYLXK2017A07)
Article History
Received: 25 May 2020
Accepted: 5 August 2020
First Online: 11 August 2020
Compliance with ethical standards
:
: The authors declare no conflict of interest. The funders had a role in the collection, analyses or interpretation of data.