Funding for this research was provided by:
Specialized Research Fund in Ningxia Higher Education Institutions (NGY2018-165)
Natural Science Foundation of Ningxia Province (2020AAC03205)
National Natural Science Foundation of China (21464001)
Article History
Received: 3 November 2019
Accepted: 10 August 2020
First Online: 17 August 2020
Compliance with ethical standards
:
: The authors declare no competing financial interest.