title: Comment.
authors.affiliation: Massachusetts General Hospital, Boston, Massachusetts.
authors.forename: George R
authors.initials: GR
authors.lastname: Prout
mesh_terms: D001500:BCG Vaccine; D006801:Humans; D006278:Medicare; D014481:United States; D001749:Urinary Bladder Neoplasms
chemical_list: D001500:BCG Vaccine