Yu, Xiaofei
Dong, Lili
Li, Lanlan
Lü, Penggong
Zhao, Jianling
Funding for this research was provided by:
National Natural Science Foundation of China (51272064, 51401074, 21603052)
Key Basic Research Program of Hebei Province of China (17964401D)
Natural Science Foundation of Hebei Province (B2015202305)
Article History
Received: 20 March 2018
Accepted: 5 July 2018
First Online: 17 July 2018
Compliance with ethical standards
:
: The authors declare that they have no conflict of interest.