Jie Chen, Dehuan Shi, Xiaoyan Liu, Shuang Fang, Jie Zhang* and Yueran Zhao*
* Corresponding authors: Jie Zhang zhangjie19630711@163.com - Yueran Zhao yrzhao@sdu.edu.cn
BMC Cancer 2012, 12:464 doi:10.1186/1471-2407-12-464