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Authors
Zhu, Jianfei
Jiang, Wei
Liu, Yichao
Yin, Ge
Yuan, Jun
He, Sailing
Ma, Yungui
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Article History
Received: 20 July 2015
Accepted: 19 October 2015
First Online: 24 November 2015
Competing interests
: The authors declare no competing financial interests.
