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Authors
Zheng, Bojin
Wu, Hongrun
Kuang, Li
Qin, Jun
Du, Wenhua
Wang, Jianmin
Li, Deyi
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Article History
Received: 3 July 2013
Accepted: 31 July 2014
First Online: 27 August 2014
Competing interests
: The authors declare no competing financial interests.
