Yu, Li-Qing
Wang, Li-Ya
Su, Fei-Hong
Hao, Ping-Yu
Wang, Huan
Lv, Yun-Kai
Funding for this research was provided by:
The National Natural Science Foundation of China (21375032)
The National Natural Science Foundation of China (21505031)
The Natural Science Foundation of Hebei Province (B2016201210)
The Natural Science Foundation of Hebei Province (B2016201213)
Article History
Received: 25 January 2018
Accepted: 10 May 2018
First Online: 22 May 2018
Compliance with ethical standards
: The author(s) declare that they have no competing interests.