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Forest plot assessing the association between forkhead box protein A1 expression and the HER-2 status in breast cancer. The center of the square indicates the study-specific OR and the horizontal lines correspond to the study-specific 95% CI. The area of the square reflects the study specific variance. The diamond represents the pooled OR and 95% CI. HER-2, human epidermal growth factor receptor-2; OR, odds ratio; CI, confidence interval.
