Sun, Youshan https://orcid.org/0000-0002-2733-4081
Gong, Xudong
Wang, Zhiqiang
Huang, Chao
Ma, Xiuqin
Wang, Meiyan
Funding for this research was provided by:
Natural Science Foundation of Hebei Province (B2013202113, E2018202333)
Article History
Received: 9 January 2019
Accepted: 1 March 2019
First Online: 13 March 2019
Compliance with Ethical Standards
:
: The authors declare that they have no competing interest.