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Authors
Wu, Shunquan
Ding, Yingying
Wu, Fuquan
Li, Ruisheng
Hu, Yan
Hou, Jun
Mao, Panyong
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Article History
Received: 27 February 2015
Accepted: 22 May 2015
First Online: 26 June 2015
Competing interests
: The authors declare no competing financial interests.
