title: The case of the missing eights. An object lesson in data quality assurance.
authors.affiliation: American Cancer Society, New York, NY.
authors.forename: S D
authors.initials: SD
authors.lastname: Stellman
mesh_terms: D001330:Electronic Data Processing / Q000379:methods / Q000592:standards*; D004812:Epidemiologic Methods; D011446:Prospective Studies; D011786:Quality Control; D011795:Surveys and Questionnaires