Funding for this research was provided by:
Natural Science Foundation of Jilin Province (61632011, 61572102)
Natural Science Foundation of Jilin Province (61602078, 61572098)
the Fundamental Research Funds for the Central Universities (DUT18ZD102)
the National Key Research Development Program of China (2016YFB1001103)
the Ministry of Education Humanities and Social Science Project (16YJCZH12)
Article History
First Online: 24 April 2019
Compliance with ethical standards
:
: The 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.