Figure 2

Hospital survival in the strata of VSS initial groups. Kaplan-Meier plot of hospital survival in the strata of VSSinitial groups (log rank Chi-square 468.1, P < 0.0001).
Hospital survival in the strata of VSS initial groups. Kaplan-Meier plot of hospital survival in the strata of VSSinitial groups (log rank Chi-square 468.1, P < 0.0001).