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Authors
Xu, Y
Qin, L
Sun, T
Wu, H
He, T
Yang, Z
Mo, Q
Liao, L
Xu, J
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Article History
Received: 24 February 2016
Revised: 12 June 2016
Accepted: 5 July 2016
First Online: 15 August 2016
Competing interests
: The authors declare no conflict of interest.
