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Authors
Tian, Y. Z.
Zhao, L. J.
Chen, S.
Shibata, A.
Zhang, Z. F.
Tsuji, N.
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Article History
Received: 22 June 2015
Accepted: 19 October 2015
First Online: 19 November 2015
Competing interests
: The authors declare no competing financial interests.
