Zhao, Jingjing
Tan, Mengge
Gao, Li
Wang, Yonghui
Funding for this research was provided by:
the Fundamental Research Funds for the Central Universities (GK201703089)
Article History
First Online: 6 July 2017
Compliance with Ethical Standards
:
: All authors declare that they have no conflict of interest.
: The principals guiding the data collection were reviewed by the ethical committee at Shaanxi Normal University and no objections were raised.
: Informed consent was obtained from all individual participants included in the study.