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Authors
Zhong, Nianbing
Liao, Qiang
Zhu, Xun
Zhao, Mingfu
Huang, Yun
Chen, Rong
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Article History
Received: 26 November 2014
Accepted: 28 May 2015
First Online: 26 June 2015
Competing interests
: The authors declare no competing financial interests.
