title: Editorial comment.
authors.affiliation: Department of Urology, Indiana Cancer Pavilion, University of Indiana School of Medicine, Indianapolis, IN.
authors.forename: Michael O
authors.initials: MO
authors.lastname: Koch
mesh_terms: D006801:Humans; D008297:Male; D008385:Marijuana Smoking / Q000009:adverse effects*; D012907:Smoking / Q000009:adverse effects*; D001749:Urinary Bladder Neoplasms / Q000453:epidemiology* / Q000209:etiology*