Zhang, Zhiwang
He, Jing
Gao, Guangxia
Tian, Yingjie
Funding for this research was provided by:
Ludong University (LY2010013)
Natural Science Foundation of Shandong Province (ZR2012FL13, ZR2016FM15)
Article History
First Online: 2 December 2017
Compliance with ethical standards
:
: The authors declare that they have no conflict of interest.
: The article does not contain any studies with human participants or animals performed by any of the authors.
: Informed consent was obtained from all individual participants included in the study.