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Figure 4

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Difference (95% CI) in mean SBP and DBP by arsenic exposure level. The area of each square is proportional to the inverse of the variance of the estimated. NA: not available [the study by Chen Y et al. (2007) did not include standard errors or data that would allow estimation of the standard errors for mean systolic and diastolic blood pressure SBP and DBP levels, and a 95% CI could not be calculated for this study]. aProfessions include taxidermists, garden fence makers, weekend cottage constructors, wood impregnators, electric pylon impregnators, and new house constructors (Jensen and Hansen 1998).

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