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Authors
Zhou, Chengcheng
Cheng, Xinhao
Zhao, Qiang
Yan, Yun
Wang, Jide
Huang, Jianbin
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Article History
Received: 17 September 2014
Accepted: 26 November 2014
First Online: 22 December 2014
Competing interests
: The authors declare no competing financial interests.
