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Authors
Huang, YongAn
Duan, Yongqing
Ding, Yajiang
Bu, Ningbin
Pan, Yanqiao
Lu, Nanshu
Yin, Zhouping
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Article History
Received: 15 April 2014
Accepted: 14 July 2014
First Online: 5 August 2014
Competing interests
: The authors declare no competing financial interests.
