Lu, Yiping
Dong, Yong
Guo, Sheng
Jiang, Li
Kang, Huijun
Wang, Tongmin
Wen, Bin
Wang, Zhijun
Jie, Jinchuan
Cao, Zhiqiang
Ruan, Haihui
Li, Tingju
Article History
Received: 29 April 2014
Accepted: 5 August 2014
First Online: 27 August 2014
Competing interests
: The authors declare no competing financial interests.