Chen, Shenghui
Sun, Shuangqing
Li, Chunling
Pittman, Charles U. Jr
Lacy, Thomas E.
Hu, Songqing
Gwaltney, Steven R.
Article History
Received: 22 March 2017
Accepted: 11 May 2017
First Online: 1 June 2017
Compliance with ethical standards
:
: This work was supported by the National Natural Science Foundation of China (grant number 51201183, 51501226) and the Fundamental Research Funds for the Central Universities (grant number 14CX02221A, 15CX08009A, and 16CX05017A).
: The authors declare that they have no conflict of interest.