Xue Zhang, Li Fu, Qiufang Zhang, Liying Yan, Yanmin Ma, Binbin Tu, Nana Liu and Jie Qiao*
* Corresponding author: Jie Qiao jie.qiao@263.net
Reproductive Biology and Endocrinology 2011, 9:46 doi:10.1186/1477-7827-9-46