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. 2014 Jun;33(6):306–316. doi: 10.5732/cjc.013.10248

Figure 8. Forest graph on the association of passive smoking with breast cancer risk for different sources and levels of exposure.

Figure 8.

Each row in the forest graph represents the original OR with 95% CI reported in one study. The diamond in the last row represents the overall OR with 95% CI.