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Authors
Mao, Hongxia
Zhao, Guangping
Guan, Yunbin
Guo, Xian
Lamaocao, Zhong
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Article History
Received: 21 August 2017
Accepted: 28 August 2017
First Online: 1 September 2017
Compliance with ethical standards
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: The authors report no conflicts of interest. The authors alone are responsible for the content and writing of the paper.
