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Authors
Liang, J-j
Chen, Y-j
Jin, Y
Yang, W-h
Mai, J-c
Ma, J
Jing, J
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Article History
Received: 6 October 2014
Revised: 30 January 2015
Accepted: 4 February 2015
First Online: 19 March 2015
Competing interests
: The authors declare no conflict of interest.
