Liu, Ruochen
Li, Jianxia
Feng, Wen
Yu, Xin
Jiao, Licheng
Funding for this research was provided by:
the National Natural Science Foundation of China ((No. 61373111))
the Fundamental Research Funds for the Central University ((Nos.K50511020014, K5051302084))
the Provincial Natural Science Foundation of Shaanxi of China ((No. 2014JM8321))
Article History
First Online: 3 February 2018
Compliance and ethical standards
:
: The all authors declare that they have no conflict of interest.
: This article does not contain any studies with human participants or animals performed by any of the authors.
: Informed consent has been obtained from all individual participants included in the study. I hereby certify that the manuscript has not sent to any other journal for publication.