title: Author Reply.
authors.affiliation: Urology Service, Department of Surgery, Memorial Sloan Kettering Cancer Center, New York, NY.
authors.forename: Matthew J
authors.initials: MJ
authors.lastname: O'Shaughnessy
authors.affiliation: Department of Radiation Oncology, Memorial Sloan Kettering Cancer Center, New York, NY.
authors.forename: Sean M
authors.initials: SM
authors.lastname: McBride
authors.affiliation: Department of Radiology, Memorial Sloan Kettering Cancer Center, New York, NY.
authors.forename: Hebert Alberto
authors.initials: HA
authors.lastname: Vargas
authors.affiliation: Genitourinary Oncology Service, Department of Medicine, Memorial Sloan Kettering Cancer Center, New York, NY.
authors.forename: Howard I
authors.initials: HI
authors.lastname: Scher