All statistical analyses were performed on R project. Group comparisons were determined by two‐tailed t-test or one‐way ANOVA. Spearman correlation analysis was applied to determine significant correlation between linear variables. The R package survival ROC was applied to plot the ROC curves (16). Survival analysis was visualized using the Kaplan–Meier curves. Univariate cox regression analysis was performed using the R package survival. All tests with P-values <0.05 were considered to be statistically significant.
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