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MAP20071018899Castelli, JimDioxin cancer risk linked to exposure levels : safety and health watch / by Jim CastelliSumario: A new study conducted by the National Institute for Occupational Safety and Health concludes that although exposure to massive amounts of dioxin is associated with increased cancer risks, exposure to smaller amounts is not. This article treats: passive smoking evidence mounts; demographics of heart disease; is health care unaffordable?; insurance reformEn: Safety & health. - Chicago. - Vol. 143, nº 4, April 1991 ; p. 69-721. Higiene industrial. 2. Contaminantes químicos. 3. Pesticidas. 4. Riesgo laboral. 5. Enfermedades profesionales. 6. Cáncer. 7. Estadísticas. 8. Estados Unidos. I. Title. II. Título: Safety & health.