title: Data systems help define relation between exposure, health effects.
authors.affiliation: Faculty of Medicine, Dalhousie University, Halifax, Nova Scotia.
authors.forename: J R
authors.initials: JR
authors.lastname: Guernsey
mesh_terms: D003195:Computer Communication Networks; D004992:Ethics, Medical; D006801:Humans; D009784:Occupational Diseases / Q000453:epidemiology*; D016273:Occupational Exposure; D011159:Population Surveillance / Q000379:methods*; D014481:United States / Q000453:epidemiology