Liu, Bo
Li, Xiujuan
Liu, Fengxi
Li, Fengyu
Wei, Shuxia
Liu, Junchao
Lv, Yang http://orcid.org/0000-0001-6914-9776
Funding for this research was provided by:
the science research project of Science and Technology Bureau of Zhangjiakou (1712003D)
the science and technology supporting plan in Hebei Province (15277707D)
Article History
Received: 11 June 2018
Accepted: 19 November 2018
First Online: 27 November 2018
Compliance with Ethical Standards
:
: The authors declare that there is no conflict of interest regarding the publication of this paper.