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Authors
Bo, Zheng
Shuai, Xiaorui
Mao, Shun
Yang, Huachao
Qian, Jiajing
Chen, Junhong
Yan, Jianhua
Cen, Kefa
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Article History
Received: 24 January 2014
Accepted: 21 March 2014
First Online: 15 April 2014
Competing interests
: The authors declare no competing financial interests.
