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. 2016 Sep 12;6:33226. doi: 10.1038/srep33226

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Copyright © 2016, The Author(s)

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(A) Survival analysis of all patients showed that the pirfenidone add-on group had fewer deaths than the control group, but the difference was not significant. (B) The pirfenidone add-on had no impact on the survival of patients with acute ILD (disease duration <3 months). (C) The pirfenidone add-on led to a significantly higher survival rate in subacute ILD patients (disease duration 3–6 months) compared with the control subgroup.