Xiao, Yang
Liu, Fang
Yang, Jingyi
Zhong, Maohua
Zhang, Ejuan
Li, Yaoming
Zhou, Dihan
Cao, Yuan
Li, Wei
Yu, Jie
Yang, Yi
Yan, Huimin
Article History
Received: 28 April 2014
Revised: 10 October 2014
Accepted: 10 October 2014
First Online: 24 November 2014
Competing interests
: The authors have no conflict of interest to disclose.