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Authors
Zeng, Zheng
Lu, Jianhua
Shu, Chang
Chen, Yuanli
Guo, Tong
Wu, Qing-ping
Yao, Shang-long
Yin, Ping
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Article History
Received: 3 November 2014
Accepted: 8 May 2015
First Online: 3 June 2015
Competing interests
: The authors declare no competing financial interests.
