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CD47 expression predicts poor prognosis in gastric cancer patients. a Kaplan–Meier curves of OS according to CD47 expression in Discovery set (top, n = 253) and Validation set (bottom, n = 200). Data were analyzed by log-rank test. b Univariate and multivariate analyses based on clinicopathological characteristics in Discovery set (top, n = 253) and Validation set (bottom, n = 200). HR refers to hazard ratio; CI refers to confidence interval
