title: Reply.
authors.affiliation: Department of Urology, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China.
authors.forename: Yi
authors.initials: Y
authors.lastname: Cai
authors.affiliation: Department of Urology, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China.
authors.forename: Hanzhong
authors.initials: H
authors.lastname: Li
authors.affiliation: Department of Urology, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China.
authors.forename: Yushi
authors.initials: Y
authors.lastname: Zhang