Chen, Shang
Zhou, Yue
Zhou, Lichun
Guan, Yanhui
Zhang, Yu
Han, Xiuzhen
Funding for this research was provided by:
Natural Science Foundation of Shandong Province (ZR2013HM084)
Key Research and Development Program of Shandong Province (2016GSF201152)
Article History
Received: 6 October 2017
Accepted: 7 February 2018
First Online: 14 February 2018
Compliance with ethical standards
:
: The authors declare that they have no conflicts of interest.