Chen, Jianhua
Ge, Yongbin
Funding for this research was provided by:
National Natural Science Foundation of China (11772165)
Natural Science Foundation of Ningxia Province (2018AAC02003)
Key Research and Development Program of Ningxia (2018BEE03007)
Article History
Received: 19 July 2018
Accepted: 30 September 2018
First Online: 10 October 2018
Competing interests
: The authors declare that they have no competing interests.