About the Authors

Xiaofeng Zhou

Affiliation Department of Urology, Beijing Friendship Hospital, Capital Medical University, Yongan Road 95, Beijing 100050, China

Guan Zhang

Affiliation Department of Urology, China-Japan Friendship Hospital, Yinghua East Road 2, Beijing 100029, China

Ye Tian

dr_tianye@163.com

Affiliation Department of Urology, Beijing Friendship Hospital, Capital Medical University, Yongan Road 95, Beijing 100050, China

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: YT. Performed the experiments: XFZ YT. Analyzed the data: GZ. Contributed reagents/materials/analysis tools: YT GZ. Wrote the paper: XFZ YT.