| Nancy Brenna Hopf Cumulative exposure estimates for polychlorinated biphenyls using a job-exposure matrixNancy Brenna Hopf National Institute for Occupational Safety and Health NIOSH, Centers for Disease Control and Prevention, Cincinnati, OH, USA Chemosphere 76:185-93. 2009 Urinary 1-hydroxypyrene levels in offshore workersNancy Brenna Hopf University of Cincinnati, Cincinnati, OH, USA Int Arch Occup Environ Health 83:55-9. 2010 Biological markers of carcinogenic exposure in the aluminum smelter industry--a systematic reviewNancy B Hopf Department of Environmental Health, University of Cincinnati, Cincinnati, Ohio 45267 0056, USA J Occup Environ Hyg 6:562-81. 2009 Background levels of polychlorinated biphenyls in the U.S. populationNancy B Hopf University of Cincinnati, Department of Environmental Health, Cincinnati, Ohio 45267 0056, USA Sci Total Environ 407:6109-19. 2009
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