title: Reply.
authors.affiliation: Division of Urology, Department of Surgery, Hospital of the University of Pennsylvania, Philadelphia, PA.
authors.forename: Eugene J
authors.initials: EJ
authors.lastname: Pietzak
authors.affiliation: Division of Urology, Department of Surgery, Hospital of the University of Pennsylvania, Philadelphia, PA.
authors.forename: Phillip
authors.initials: P
authors.lastname: Mucksavage
authors.affiliation: Division of Urology, Department of Surgery, Hospital of the University of Pennsylvania, Philadelphia, PA.
authors.forename: Thomas J
authors.initials: TJ
authors.lastname: Guzzo
authors.affiliation: Division of Urology, Department of Surgery, Hospital of the University of Pennsylvania, Philadelphia, PA.
authors.forename: S Bruce
authors.initials: SB
authors.lastname: Malkowicz
mesh_terms: D002295:Carcinoma, Transitional Cell / Q000453:epidemiology* / Q000209:etiology*; D005260:Female; D006801:Humans; D008297:Male; D012907:Smoking / Q000009:adverse effects*; D001749:Urinary Bladder Neoplasms / Q000453:epidemiology* / Q000209:etiology*