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Authors
Jia, L
Zhou, Z
Liang, H
Wu, J
Shi, P
Li, F
Wang, Z
Wang, C
Chen, W
Zhang, H
Wang, Y
Liu, R
Feng, J
Chen, C
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Article History
Received: 4 January 2015
Revised: 17 May 2015
Accepted: 5 June 2015
First Online: 20 July 2015
Competing interests
: The authors declare no conflict of interest.
