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Kaplan-Meier curves of IL-6 signalling biomarkers, biochemical data and composite risk scores in COVID-19 severe patients. Parameters of Kaplan-Meier survival analysis: events (death); time to events (time from hospital admission to death) and end-point (30-day). Differences in time to death curves were compared with the log-rank/Breslow tests. Colour shades represent the 95% CI.
