title: Reply by the Authors.
authors.affiliation: Department of Urology, Beijing Chao-Yang Hospital, Capital Medical University, Beijing, China.
authors.forename: Hu
authors.initials: H
authors.lastname: Han
authors.affiliation: Department of Urology, Beijing Chao-Yang Hospital, Capital Medical University, Beijing, China.
authors.forename: Xiao-Dong
authors.initials: XD
authors.lastname: Zhang
authors.affiliation: Department of Urology, Beijing Chao-Yang Hospital, Capital Medical University, Beijing, China.
authors.forename: Long
authors.initials: L
authors.lastname: Tian