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Authors
Luo, W
Wu, H
Ye, Y
Li, Z
Hao, S
Kong, L
Zheng, X
Lin, S
Nie, Q
Zhang, X
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Article History
Received: 24 April 2014
Revised: 1 June 2014
Accepted: 3 June 2014
First Online: 17 July 2014
Competing interests
: The authors declare no conflict of interest.
