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Authors
Xue, Wen-Qiong
He, Yong-Qiao
Zhu, Jin-Hong
Ma, Jian-Qun
He, Jing
Jia, Wei-Hua
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Article History
Received: 16 July 2014
Accepted: 7 October 2014
First Online: 28 October 2014
Competing interests
: The authors declare no competing financial interests.
