Huo, Jiuyuan
Liu, Liqun
Funding for this research was provided by:
National Nature Science Foundation of China (61462058, 61741201)
Gansu Province Science and Technology Program (1606RJZA004)
Article History
Received: 13 January 2018
Accepted: 10 April 2018
First Online: 25 April 2018
Compliance with ethical standards
:
: The authors declare no conflict of interest.