Xiufen Zhuang, Wen Zhang, Yatong Chen, Xiangping Han, Jie Li, Yu Zhang, Youhui Zhang, Shuren Zhang* and Binlei Liu*
* Corresponding authors: Shuren Zhang biotherapy@caca.sina.net - Binlei Liu liubl1@yahoo.com
BMC Cancer 2012, 12:549 doi:10.1186/1471-2407-12-549