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Authors
Liu, Wen-jie
Zhong, Zhong-jian
Cao, Long-hui
Li, Hui-ting
Zhang, Tian-hua
Lin, Wen-qian
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Article History
Received: 7 April 2015
Accepted: 15 July 2015
First Online: 10 August 2015
Competing interests
: The authors declare no competing financial interests.
