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Kaplan–Meier survival curves with 95% confidence intervals (dotted lines) of the mortality within 28 days after onset of ARDS between the short-term and long-term storage group. The hazard ratio is provided with 95% confidence intervals. The median observation time was 20 days (IQR, 17–24) in the short-term storage group and 17 days (15–24) in the long-term storage group. The distribution of censoring was similar between the two groups (p = 0.79).
