Gao, Tian
Wang, Junmin
Hao, Lin
Yang, Xiumin
Wang, Chun
Wu, Qiuhua
Wang, Zhi
Funding for this research was provided by:
National Natural Science Foundation of China (31471643)
Natural Science Foundation of Hebei Province (B2016204136)
Article History
Received: 11 August 2018
Accepted: 5 November 2018
First Online: 20 November 2018
Compliance with ethical standards
: The author(s) declare that they have no competing interests.