Liu, Lining
Liu, Pingzeng
Wen, Fujiang
Zhang, Chao
Zhao, Rui
Yan, Maoling
Yu, Xueru
Funding for this research was provided by:
Shandong independent innovation and achievements transformation project (2014ZZCX07106)
Article History
Received: 7 March 2018
Accepted: 7 May 2018
First Online: 18 May 2018
Competing interests
: The authors declare that they have no competing interests.
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