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Authors
Song, F-f
Xia, L-l
Ji, P
Tang, Y-b
Huang, Z-m
Zhu, L
Zhang, J
Wang, J-q
Zhao, G-p
Ge, H-l
Zhang, Y
Wang, Y
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Article History
Received: 13 February 2015
Revised: 24 March 2015
Accepted: 2 April 2015
First Online: 15 June 2015
Competing interests
: The authors declared no conflict of interest.
