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Authors
Liu, Yong-Qiang
Wang, Feng-Xia
Xiao, Yan
Peng, Hong-Dan
Zhong, Hai-Jian
Liu, Zheng-Hui
Pan, Ge-Bo
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Article History
Received: 27 February 2014
Accepted: 18 July 2014
First Online: 8 August 2014
Competing interests
: The authors declare no competing financial interests.
