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Cumulative univariate 5-year overall survival analysis. Kaplan-Meier curve (log-rank test) for periostin expression in the cytoplasm of tumor epithelial cells (*P = 0.009) (A) and for lymphocyte infiltration (**P = 0.002) (B). The median follow-up time was 39 months (range, 0 to 229 months). Periostin negative versus positive. Lymphocyte infiltration low versus high (for definition see text).
