About the Authors

Tong Ren

Contributed equally to this work with: Tong Ren, Yan Liu

Affiliation Department of Urinary Surgery, First Affiliated Hospital, Harbin Medical University, NanGang District, Harbin, Heilongjiang Province China

Yan Liu

Contributed equally to this work with: Tong Ren, Yan Liu

Affiliation Department of Biostatistics, School of Public Health, Harbin Medical University, Nangang District, Harbin, China

Xiaowen Zhao

Affiliation Department of Health Economics, School of Public Health, Harbin Medical University, Nangang District, Harbin, China

Shaobin Ni

Affiliation Department of Urinary Surgery, First Affiliated Hospital, Harbin Medical University, NanGang District, Harbin, Heilongjiang Province China

Cheng Zhang

Affiliation Department of Urinary Surgery, First Affiliated Hospital, Harbin Medical University, NanGang District, Harbin, Heilongjiang Province China

Changgang Guo

Affiliation Department of Urinary Surgery, First Affiliated Hospital, Harbin Medical University, NanGang District, Harbin, Heilongjiang Province China

Minghua Ren

renminghua1972@163.com

Affiliation Department of Urinary Surgery, First Affiliated Hospital, Harbin Medical University, NanGang District, Harbin, Heilongjiang Province China

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: TR MR. Performed the experiments: TR MR YL. Analyzed the data: TR YL. Contributed reagents/materials/analysis tools: XZ SN CZ CG. Wrote the paper: TR MR.