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Authors
Jiao, H-K
Xu, Y
Li, J
Wang, W
Mei, Z
Long, X-D
Chen, G-Q
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Article History
Received: 9 December 2014
Revised: 29 January 2015
Accepted: 2 February 2015
First Online: 12 March 2015
Competing interests
: The authors declare no conflict of interest.
