1. Knuppe Molecular Urology Laboratory, Department of Urology, School of Medicine, University of California, San Francisco, San Francisco, California.
2. Department of Urology, Peking University First Hospital, Beijing, People's Republic of China.
3. The Institute of Urology, Peking University, Beijing, People's Republic of China.
4. Department of Urology, School of Medicine, Capital Medical University, Beijing, People's Republic of China.