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Authors
Shen, Yanhong
Gao, Tao
Tian, Xiaofeng
Chen, Xiaojun
Xiao, ChengJian
Lu, Tiecheng
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Article History
Received: 23 January 2015
Accepted: 27 April 2015
First Online: 2 June 2015
Competing interests
: The authors declare no competing financial interests.
