Kou, Liang
Huang, Tieqi
Zheng, Bingna
Han, Yi
Zhao, Xiaoli
Gopalsamy, Karthikeyan
Sun, Haiyan
Gao, Chao
Article History
Received: 11 October 2013
Accepted: 28 March 2014
First Online: 2 May 2014
Competing interests
: The authors declare no competing financial interests.