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Authors
Sun, Yan-Wei
Tee, Chuan-Sia
Ma, Yong-Huan
Wang, Gang
Yao, Xiang-Mei
Ye, Jian
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Article History
Received: 24 June 2015
Accepted: 6 October 2015
First Online: 25 November 2015
Competing interests
: The authors declare no competing financial interests.
