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Authors
Chen, R
Duan, J
Li, L
Ma, Q
Sun, Q
Ma, J
Li, C
Zhou, X
Chen, H
Jing, Y
Zhao, S
Wu, X
Zhang, H
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Article History
Received: 17 November 2015
Revised: 19 May 2016
Accepted: 16 June 2016
First Online: 15 August 2016
Competing interests
: The authors declare no conflict of interest.
