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Authors
Wang, Junxin
Ming, Tian
Jin, Zhao
Wang, Jianfang
Sun, Ling-Dong
Yan, Chun-Hua
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Article History
Received: 30 May 2014
Accepted: 27 October 2014
First Online: 28 November 2014
Competing interests
: The authors declare no competing financial interests.
