Xu, Ruirui
Liu, Caiyun
Li, Ning
Zhang, Shizhong
Funding for this research was provided by:
National Natural Science Foundation of China (Grant No. 31401822, Grant No. 31400225)
Shandong Province Young and Middle-aged Scientists Research Awards Fund (Grant No. BS2014SW014)
Article History
Received: 27 February 2016
Accepted: 27 July 2016
First Online: 30 July 2016
Compliance with ethical standards
:
: The authors declare that there is no conflict of interest.