Chen, Bing
Wang, Xinpeng
Gao, Bin
Fang, Zheng
Kang, Jinfeng
Liu, Lifeng
Liu, Xiaoyan
Lo, Guo-Qiang
Kwong, Dim-Lee
Article History
Received: 10 April 2014
Accepted: 9 October 2014
First Online: 31 October 2014
Competing interests
: The authors declare no competing financial interests.