Xie, Jianjun
Zeng, Wenyi
Li, Junhong
Yin, Qian
Funding for this research was provided by:
National Nature Science Foundation of China (10971243)
Key Research Plan of Hebei Province (17210109D)
Hebei Normal University (L2015k01, L2017B09)
Heibei Normal University (S2016Y13)
Article History
First Online: 24 November 2017
Compliance with ethical standards
:
: We declare that we have no conflict of interest.
: This article does not contain any studies with human participants performed by any of the authors.