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Authors
Zhang, M-M
Jiang, Y-S
Lv, H-C
Mu, H-B
Li, J
Shang, Z-W
Zhang, R-J
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Article History
Received: 16 April 2014
Revised: 6 May 2014
Accepted: 23 June 2014
First Online: 7 August 2014
Competing interests
: The authors declare no conflict of interest.
