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Authors
Shi, Rong-liang
Qu, Ning
Liao, Tian
Wei, Wen-jun
Wang, Yu-Long
Ji, Qing-hai
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Article History
Received: 29 September 2015
Accepted: 10 May 2016
First Online: 8 June 2016
Competing interests
: The authors declare no competing financial interests.
