Wang, Qiushi
Wang, Weilong
Liu, Xiaoyu
Ma, Jinwen
Zhang, Jian
Cong, Ridong
Funding for this research was provided by:
National Natural Science Foundation of China (11504028, 61504036)
Natural Science Foundation of Hebei Province (A2016201087)
Article History
Received: 4 September 2017
Accepted: 19 January 2018
First Online: 1 February 2018
Compliance with ethical standards
:
: The authors declare that they have no conflict of interest.