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Authors
Yan, F
Shen, N
Pang, J
Xie, D
Deng, B
Molina, J R
Yang, P
Liu, S
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Article History
Received: 24 April 2014
Revised: 9 July 2014
Accepted: 29 July 2014
First Online: 11 September 2014
Competing interests
: The authors declare no conflict of interest.
