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Figure 5: KMSA curves representing the time course of the probability of survival for GOLD stages (long rank test; P< 0.001). KMSA=Kaplan–Meier survival analysis, Gold=Global initiative for chronic obstructive lung disease

Figure 5: KMSA curves representing the time course of the probability of survival for GOLD stages (long rank test; <i>P</i>< 0.001). KMSA=Kaplan–Meier survival analysis, Gold=Global initiative for chronic obstructive lung disease