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Authors
Bao, Yanjun
Jiang, Qiao
Kang, Yimin
Zhu, Xing
Fang, Zheyu
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Article History
Received: 23 December 2016
Revised: 13 April 2017
Accepted: 18 April 2017
First Online: 20 April 2017
Competing interests
: The authors declare no conflict of interest.
