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Authors
Xu, Qingqing
Zhou, Wenjun
Kodrul, Tatiana M.
Naugolnykh, Serge V.
Jin, Jianhua
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Article History
Received: 29 July 2015
Accepted: 14 October 2015
First Online: 9 November 2015
Competing interests
: The authors declare no competing financial interests.
