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TOXICOLOGY: Factory Study Shows Low Levels of Benzene Reduce Blood Cell Counts

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Science  03 Dec 2004:
Vol. 306, Issue 5702, pp. 1665
DOI: 10.1126/science.306.5702.1665a

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A tightly controlled study, reported on page 1774 of this issue of Science, shows that workers who inhaled less than 1 part per million of benzene--an exposure considered safe under U.S. occupational guidelines--had fewer white blood cells than did unexposed workers.