Chen, Lin-xing
Hu, Min
Huang, Li-nan
Hua, Zheng-shuang
Kuang, Jia-liang
Li, Sheng-jin
Shu, Wen-sheng
Article History
Received: 1 September 2014
Accepted: 16 November 2014
First Online: 23 December 2014
Competing interests
: The authors declare no conflict of interest.