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Response to Swaen et al
  1. Craig Steinmaus1,2,
  2. Allan H Smith1,
  3. Martyn T Smith1
  1. 1School of Public Health, University of California, Berkeley, California, USA
  2. 2Office of Environmental Health Hazard Assessment, California Environmental Protection Agency, Oakland, California, USA
  1. Correspondence to Craig Steinmaus, School of Public Health, University of California, University Hall, Berkeley, CA 94720-7360, USA; craigs{at}

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The differences in methods between our meta-analysis and that of Swaen et al (see page 286) did not ‘vastly alter’ our most important finding or change our overall conclusion (Occup Environ Med 2008;65:371–8). Our major conclusion was that evidence of an association between benzene and non-Hodgkin's lymphoma (NHL) could be found when analyses were focused on results from highly exposed workers and were appropriately adjusted for the healthy worker effect. In their analysis of high exposure benzene studies, Swaen et al …

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  • Competing interests None.

  • Provenance and peer review Commissioned; not externally peer reviewed.

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