title: Author Reply.
authors.affiliation: Department of Urology, Boston Children's Hospital, Harvard Medical School, Boston, MA.
authors.forename: Joseph W
authors.initials: JW
authors.lastname: McQuaid
authors.affiliation: Department of Urology, Boston Children's Hospital, Harvard Medical School, Boston, MA.
authors.forename: Marc
authors.initials: M
authors.lastname: Cendron