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Authors
Tian, Hao
Teng, Fei
Xu, Juan
Lou, Sunqi
Li, Na
Zhao, Yunxuan
Chen, Mindong
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Article History
Received: 30 June 2014
Accepted: 1 December 2014
First Online: 19 January 2015
Competing interests
: The authors declare no competing financial interests.
