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Authors
Xu, Xiao-Yan
Shen, Yu-Bang
Fu, Jian-Jun
Yu, Hong-Yan
Huang, Wen-Ji
Lu, Li-Qun
Li, Jia-Le
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Article History
Received: 20 July 2015
Accepted: 23 November 2015
First Online: 4 January 2016
Competing interests
: The authors declare no competing financial interests.
