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Authors
Tan, Peng
Guan, Hanfeng
Xie, Linka
Mi, Baoguo
Fang, Zhong
Li, Jing
Li, Feng
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Article History
Received: 23 June 2015
Accepted: 21 October 2015
First Online: 16 November 2015
Competing interests
: The authors declare no competing financial interests.
