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Figure 2.
Kaplan-Meier curve for time to first COPD exacerbation.
Choudhury et al. Respiratory Research 2007 8:93 doi:10.1186/1465-9921-8-93
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Resolution: standard / high Figure 2.
Kaplan-Meier curve for time to first COPD exacerbation.
Choudhury et al. Respiratory Research 2007 8:93 doi:10.1186/1465-9921-8-93 |