Wan, Wenfang
Sun, Jingjing
Liu, Wanru
Huo, Shuying
Shen, Shigang
Funding for this research was provided by:
Natural Science Foundation of Hebei Province (B2016201014)
Natural Science Foundation of Educational Commission of Hebei Province (ZD2016073)
National Natural Science Foundation of China (21406047)
Article History
Received: 6 November 2018
Accepted: 1 February 2019
First Online: 8 March 2019
Compliance with ethical standards
:
: All authors declare that they have no conflict of interest in this work.