Liang, Shu-xuan http://orcid.org/0000-0003-4159-4004
Gao, Ning http://orcid.org/0000-0001-8570-8312
Li, Xiliang http://orcid.org/0000-0002-1542-7432
Xi, Xiaocan http://orcid.org/0000-0003-2927-6265
Funding for this research was provided by:
Natural Science Foundation of Hebei Province (B2018201283)
Article History
Received: 21 August 2018
Accepted: 9 October 2018
First Online: 24 October 2018
Compliance with ethical standards
:
: The authors declare that they have no competing interests.