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Authors
Zhang, Yong
Wang, Tao
Huang, Peiyu
Li, Dan
Qiu, Jiang
Shen, Tong
Xie, Peng
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Article History
Received: 11 August 2014
Accepted: 19 May 2015
First Online: 16 July 2015
Competing interests
: The authors declare no competing financial interests.
