Document is current
Any future updates will be listed below
-
Authors
Li, Ping
Feng, Meiqiang
Wang, Minmin
-
Funding
Funding for this research was provided by:
the Beijing Natural Science Foundation (1163007)
- License Information
-
More Information
Article History
Received: 15 January 2018
Accepted: 13 March 2018
First Online: 22 March 2018
Competing interests
: The authors declare that there is no conflict of interest regarding the publication of this manuscript. The authors declare that they have no competing interests.
