1. Tongji School of Pharmacy
2. National Engineering Research Center for Nanomedicine
3. Huazhong University of Science and Technology
4. Wuhan 430030
5. P.R. China
6. The Mary M. Wohlford Laboratory for Male Contraceptive Research
7. Center for Biomedical Research
8. Population Council
9. New York
10. USA
11. State Key Laboratory of Oncogenes and Related Genes
12. Renji-Med X Clinical Stem Cell Research Center
13. Ren Ji Hospital
14. School of Medicine
15. School of Biomedical Engineering & Med-X Research Institute