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Authors
Meng, X
Wang, J
Yuan, C
Li, X
Zhou, Y
Hofestädt, R
Chen, M
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Article History
Received: 6 August 2015
Revised: 21 September 2015
Accepted: 15 October 2015
First Online: 21 December 2015
Competing interests
: The authors declare no conflict of interest.
