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Authors
Xue, Chun-hua
Wu, Feng
Jiang, Hai-tao
Li, Yunhui
Zhang, Ye-wen
Chen, Hong
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Article History
Received: 26 August 2016
Accepted: 22 November 2016
First Online: 19 December 2016
Competing interests
: The authors declare no competing financial interests.
