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Authors
Quan, Tingwei
Li, Jing
Zhou, Hang
Li, Shiwei
Zheng, Ting
Yang, Zhongqing
Luo, Qingming
Gong, Hui
Zeng, Shaoqun
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Article History
Received: 28 November 2013
Accepted: 9 April 2014
First Online: 15 May 2014
Competing interests
: The authors declare no competing financial interests.
