Yu, Kai-jing
Zhang, Ji-rong
Li, Ying
Huang, Xiaoyi
Liu, Tiemin
Li, Chuanfu
Wang, Rui-tao
Article History
Received: 8 February 2016
Revised: 11 July 2016
Accepted: 12 July 2016
First Online: 25 August 2016
Competing interests
: The authors declare no conflict of interest.
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