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. 2018 May 4;19:82. doi: 10.1186/s12931-018-0779-y

Fig. 4.

Fig. 4

Kaplan-Meier curves for survival by biomarker tertiles at time of acute exacerbation of IIP. Asterisks indicate statistical significance between the lowest (T1), middle (T2), and highest (T3) biomarker tertiles (*p < 0.05)