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Authors
Chen, X. P.
Jiang, J. K.
Liang, Q. H.
Yang, N.
Ye, H. Y.
Cai, M.
Shen, L.
Yang, D. G.
Ren, T. L.
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Article History
Received: 9 April 2015
Accepted: 22 October 2015
First Online: 20 November 2015
Competing interests
: The authors declare no competing financial interests.
