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Authors
Xu, Maowen
Jia, Min
Mao, Cuiping
Liu, Sangui
Bao, Shujuan
Jiang, Jian
Liu, Yang
Lu, Zhisong
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Article History
Received: 17 September 2015
Accepted: 25 November 2015
First Online: 6 January 2016
Competing interests
: The authors declare no competing financial interests.
