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Authors
Chen, Lei
Li, Zhong-Bin
Hui, Cang
Cheng, Xiaofei
Li, Bai-Lian
Shi, Pei-Jian
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Article History
Received: 8 December 2015
Accepted: 27 May 2016
First Online: 13 June 2016
Competing interests
: The authors declare no competing financial interests.
