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Authors
Xu, Lixue
Qin, Wen
Zhuo, Chuanjun
Zhu, Jiajia
Liu, Huaigui
Liu, Xingyun
Xu, Yongjie
Yu, Chunshui
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Article History
Received: 2 November 2014
Accepted: 19 May 2015
First Online: 9 June 2015
Competing interests
: The authors declare no competing financial interests.
