Wang, Hefang
Fu, Qinglong
Zhang, Guanyan
Sun, Yangyang
Funding for this research was provided by:
Natural Sciences Foundation of Hebei province (B2017202226)
National Natural Science Foundation of China (21776058)
Article History
Received: 15 August 2018
Accepted: 24 September 2018
First Online: 11 October 2018
Compliance with Ethical Standards
:
: The authors declare that they have no conflict of interest.