Liu, Chang
Ma, Jianling http://orcid.org/0000-0003-2739-3943
Funding for this research was provided by:
Humanities & Social Sciences Program of Chongqing Education Committee (17SKG192, 16SKGH054)
The key social science program of Chongqing University of Posts and Telecommunications (2017KZD08)
Article History
First Online: 13 September 2018
Compliance with Ethical Standards
:
: 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.
: On behalf of all authors, the corresponding author states that there is no conflict of interest.
: Informed consent was obtained from all individual participants included in the study.