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Authors
Liu, Nian
Dai, Qing
Zheng, Guanqun
He, Chuan
Parisien, Marc
Pan, Tao
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Article History
Received: 24 November 2014
Accepted: 14 January 2015
First Online: 25 February 2015
Change Date: 17 March 2015
Change Type: Correction
Change Details: The received date year was corrected.
Competing interests
: The authors declare no competing financial interests.
