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Authors
Lu, Qing-Bin
Wang, Zhi-Ping
Gao, Li-Jie
Gong, Rui
Sun, Xi-Hong
Wang, Meng
Zhao, Zhong-Tang
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Article History
Received: 16 May 2014
Accepted: 5 December 2014
First Online: 8 January 2015
Competing interests
: The authors declare no competing financial interests.
