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Authors
Bai, Xu-Dong
Liang, Xian-Ling
Li, Jian-Ping
Wang, Kun
Geng, Jun-Ping
Jin, Rong-Hong
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Article History
Received: 7 April 2016
Accepted: 25 May 2016
First Online: 10 June 2016
Competing interests
: The authors declare no competing financial interests.
