Funding for this research was provided by:
National Natural Science Foundation of China (61403077)
Natural Science Foundation for Youths of JiLin Province (20150520061JH)
Fundamental Research Funds for the Central Universities (2412019FZ047)
Article History
Received: 31 March 2019
Accepted: 6 June 2019
First Online: 17 June 2019
Ethics approval and consent to participate
: Not applicable.
: Not applicable.
: The authors declare that they have no competing interests.