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Authors
Guo, H.
Khan, M. I.
Cheng, C.
Fan, W.
Dames, C.
Wu, J.
Minor, A. M.
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Article History
Received: 20 June 2014
Accepted: 15 August 2014
First Online: 13 October 2014
Competing interests
: The authors declare no competing financial interests.
