Guo, Yaning
You, Xuqun
Gu, Yuanbo
Wu, Guoqiang
Xu, Chenhong
Funding for this research was provided by:
Key Projects of Philosophy and Social Sciences Research (11JZD044)
Science and Technology Co-Ordinating Innovative Engineering Projects in Shaanxi Province (2015TZC-S-13-3)
Article History
First Online: 20 March 2018
Compliance with Ethical Standards
:
: The authors declare that they have no conflict of interest.
: All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards.
: Informed consent was obtained from all individual participants included in the study.