Peng, Xudong
Zhao, Guiqiu
Lin, Jing
Qu, Jianqiu
Zhang, Yingxue
Li, Cui
Funding for this research was provided by:
National Natural Science Foundation of China (No. 81470609)
National Natural Science Foundation of China (No. 81170825)
Natural Science Foundation of Shandong Province (ZR2013HQ007)
Natural Science Foundation of Shandong Province (ZR2012FZ001)
Article History
Received: 12 December 2017
Accepted: 6 July 2018
First Online: 13 July 2018
Ethics approval and consent to participate
: This study followed the tenets of the Declaration of Helsinki.
: Not applicable.
: The authors declare that they have no competing interests.
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