Ma, Xiaoyu
Li, Chenchen
Sun, Linchong
Huang, De
Li, Tingting
He, Xiaoping
Wu, Gongwei
Yang, Zheng
Zhong, Xiuying
Song, Libing
Gao, Ping
Zhang, Huafeng
Article History
Received: 20 March 2014
Accepted: 9 September 2014
First Online: 10 October 2014
Competing interests
: The authors declare no competing financial interests.