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Authors
Tang, Jingjing
Li, Qiongfen
Tian, Bingjun
Zhang, Jie
Li, Kai
Ding, Zhengrong
Lu, Lin
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Article History
Received: 4 March 2016
Accepted: 16 June 2016
First Online: 12 July 2016
Competing interests
: The authors declare no competing financial interests.
