title: Medical surveillance: extent and effectiveness?
authors.forename: J A
authors.initials: JA
authors.lastname: Hathaway
mesh_terms: D006801:Humans; D016272:Occupational Health; D009786:Occupational Health Services; D011787:Quality of Health Care; D012107:Research Design; D014481:United States; D014489:United States Occupational Safety and Health Administration