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Authors
Liu, Jiangwei
Liao, Meiyong
Imura, Masataka
Tanaka, Akihiro
Iwai, Hideo
Koide, Yasuo
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Article History
Received: 15 July 2014
Accepted: 26 August 2014
First Online: 22 September 2014
Competing interests
: The authors declare no competing financial interests.
