title: Author Reply.
authors.affiliation: Department of Surgery, Division of Urology, The Hospital for Sick Children, University of Toronto, Toronto, Ontario, Canada.
authors.forename: Roberto Iglesias
authors.initials: RI
authors.lastname: Lopes
authors.affiliation: Department of Surgery, Division of Urology, The Hospital for Sick Children, University of Toronto, Toronto, Ontario, Canada.
authors.forename: Armando J
authors.initials: AJ
authors.lastname: Lorenzo