Liduan Zheng, Dan Li, Xuan Xiang, Ling Tong, Meng Qi, Jiarui Pu, Kai Huang and Qiangsong Tong*
* Corresponding author: Qiangsong Tong qs_tong@hotmail.com
BMC Cancer 2013, 13:74 doi:10.1186/1471-2407-13-74