Liu, Jian-Guo
He, Yan
Funding for this research was provided by:
National Natural Science Foundation of China (81260644)
Article History
Received: 23 October 2017
Accepted: 26 January 2018
First Online: 5 February 2018
Compliance with ethical standards
:
: The authors declare that there is no conflict of interests regarding the publication of this article.
: The authors state that this research complies with ethical standards. This research does not involve either human participants or animals.