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Scatter plot of survival by NK cell counts. (A) Vaccine-related time-to-treatment failure: ρ = 0.500 (95% CI 0.279–0.667), p < 0.001; (B) overall survival: ρ = 0.437 (95% CI 0.219–0.619), p = 0.001. Log—logarithmic values; CI—confidence interval.
