1. Department of Urology, Xijing Hospital, Fourth Military Medical University, Xi’an, Shaanxi, China;
2. Department of Biochemistry and Molecular Biology, Fourth Military Medical University, Xi’an, Shaanxi, China;
3. Department of Gene Technology, Fourth Military Medical University, Xi’an, Shaanxi, China;
4. Department of Biochemistry, University of Washington, Seattle, WA, USA