About the Authors

Hwanik Kim

Affiliation Department of Urology, Seoul National University College of Medicine, Seoul, Korea

Myong Kim

Affiliation Department of Urology, Seoul National University College of Medicine, Seoul, Korea

Cheol Kwak

Affiliation Department of Urology, Seoul National University College of Medicine, Seoul, Korea

Hyeon Hoe Kim

Affiliation Department of Urology, Seoul National University College of Medicine, Seoul, Korea

Ja Hyeon Ku

kuuro70@snu.ac.kr

Affiliation Department of Urology, Seoul National University College of Medicine, Seoul, Korea

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: JHK CK HHK. Analyzed the data: HK MK JHK. Wrote the paper: HK. Critical comments: CK HHK. Quality assessments of articles: MK HK JHK.