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Authors
Huo, Nengjie
Yang, Shengxue
Wei, Zhongming
Li, Shu-Shen
Xia, Jian-Bai
Li, Jingbo
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Article History
Received: 19 February 2014
Accepted: 28 April 2014
First Online: 9 June 2014
Competing interests
: The authors declare no competing financial interests.
